星空传媒 Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Fair Values of Other Benefit Plan Assets) (Details)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Fair Values of Other Benefit Plan Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	$ 215.6	$ 202.4	$ 193.4
Hedge Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	37.4	40.6	40.7
Private Equity Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	39.8	36.1	33.1
Real Estate [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	65.5	61.9	57.5
Other Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	262.5	253.0	250.6
Other Benefits [Member] \| Equity Securities [Member] \| U S Large Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	11.4	10.6	听
Other Benefits [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	2.8	2.7	听
Other Benefits [Member] \| Equity Securities [Member] \| International [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	8.8	8.1	听
Other Benefits [Member] \| Fixed Income Investments [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	204.1	197.9	听
Other Benefits [Member] \| Hedge Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	11.4	11.2	听
Other Benefits [Member] \| Private Equity Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	3.9	4.3	听
Other Benefits [Member] \| Structured Credit [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	7.9	6.9	听
Other Benefits [Member] \| Real Estate [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	12.0	11.1	听
Other Benefits [Member] \| Cash [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.2	0.2	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	187.3	183.6	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| U S Large Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	11.4	10.6	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	2.8	2.7	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Equity Securities [Member] \| International [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	8.8	8.1	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Fixed Income Investments [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	164.1	162.0	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Hedge Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Private Equity Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Structured Credit [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Real Estate [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Quoted Prices in Active Markets for Identical Assets/Liabilities (Level 1) [Member] \| Cash [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.2	0.2	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	40.0	35.9	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member] \| U S Large Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Equity Securities [Member] \| International [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Fixed Income Investments [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	40.0	35.9	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Hedge Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Private Equity Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Structured Credit [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Real Estate [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Fair Value, Inputs, Level 2 [Member] \| Cash [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	35.2	33.5	32.5
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| U S Large Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| U S Small Mid Cap [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Equity Securities [Member] \| International [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Fixed Income Investments [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	0.0	0.0	听
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Hedge Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	11.4	11.2	11.2
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Private Equity Funds [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	3.9	4.3	5.5
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Structured Credit [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	7.9	6.9	5.8
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Real Estate [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	12.0	11.1	$ 10.0
Other Benefits [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Cash [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Defined Benefit Plan, Fair Value of Plan Assets	$ 0.0	$ 0.0	听