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 (Weighted-Average Assumptions Used to Determine Net Benefit Cost) (Details)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Weighted-Average Assumptions Used to Determine Net Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Expected return on plan assets	8.25%	8.25%	8.25%
Other Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Expected return on plan assets	7.00%	7.00%	7.00%
SERP [Domain] \| Pension Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.90%	4.01%	3.83%
SERP [Domain] \| Pension Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.69%	3.87%	3.83%
SERP [Domain] \| Pension Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.36%	3.30%	3.83%
Ore Mining [Domain] \| Pension Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.04%	4.28%	3.83%
Ore Mining [Domain] \| Pension Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.27%	4.60%	3.83%
Ore Mining [Domain] \| Pension Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.41%	3.48%	3.83%
Salary [Member] \| Pension Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Rate of compensation increase	3.00%	3.00%	3.00%
Salary [Member] \| Pension Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.91%	4.13%	3.83%
Salary [Member] \| Pension Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.93%	4.14%	3.83%
Salary [Member] \| Pension Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.21%	3.21%	3.83%
Salary [Member] \| Other Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Rate of compensation increase	3.00%	3.00%	3.00%
Salary [Member] \| Other Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.98%	4.22%	3.83%
Salary [Member] \| Other Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.30%	4.63%	3.83%
Salary [Member] \| Other Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.28%	3.31%	3.83%
Hourly [Member] \| Pension Benefits [Member]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Expected return on plan assets	2.00%	2.00%	2.50%
Hourly [Member] \| Pension Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.02%	4.27%	3.83%
Hourly [Member] \| Pension Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.30%	4.66%	3.83%
Hourly [Member] \| Pension Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.38%	3.46%	3.83%
Hourly [Member] \| Other Benefits [Member] \| Obligation [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.03%	4.32%	3.83%
Hourly [Member] \| Other Benefits [Member] \| Service Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	4.23%	4.56%	3.83%
Hourly [Member] \| Other Benefits [Member] \| Interest Cost [Domain]	听	听	听
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	听	听	听
Discount rate	3.24%	3.48%	3.83%