星空传媒 Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details)

SUPPLEMENTARY GUARANTOR INFORMATION (Supplementary Statements of Condensed Consolidating Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
Net Cash Provided by (Used in) Operating Activities	$ (142.9)	$ (25.1)	听	听
Property, Plant and Equipment, Cash Additions	(12.4)	(25.9)	听	听
Purchase of property, plant and equipment	(59.0)	(2.0)	听	听
Intercompany investments	0.0	0.0	听	听
Other investing activities	0.0	0.5	听	听
Net Cash Provided by (Used in) Investing Activities	(71.4)	(27.4)	听	听
Net proceeds from issuance of common shares	0.0	661.3	听	听
Proceeds from issuance of debt	0.0	500.0	听	听
Debt issuance costs	(1.5)	(8.5)	听	听
Gain (Loss) on Repurchase of Debt Instrument	听	(1,115.5)	听	听
Distributions of partnership equity	0.0	(8.7)	听	听
Intercompany financing	0.0	0.0	听	听
Other financing activities	(5.5)	(5.6)	听	听
Net Cash Provided by (Used in) Financing Activities	(7.0)	23.0	听	听
EFFECT OF EXCHANGE RATE CHANGES ON CASH	0.2	1.4	听	听
Cash and Cash Equivalents, Period Increase (Decrease)	(221.1)	(28.1)	听	听
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale	786.6	295.3	$ 1,007.7	$ 323.4
Reportable Legal Entities [Member] \| Cliffs Shareholders Equity [Member]	听	听	听	听
Net Cash Provided by (Used in) Operating Activities	(54.7)	(99.5)	听	听
Property, Plant and Equipment, Cash Additions	0.0	(0.8)	听	听
Purchase of property, plant and equipment	0.0	0.0	听	听
Intercompany investments	(137.7)	(56.5)	听	听
Other investing activities	听	0.0	听	听
Net Cash Provided by (Used in) Investing Activities	(137.7)	(57.3)	听	听
Net proceeds from issuance of common shares	听	661.3	听	听
Proceeds from issuance of debt	听	500.0	听	听
Debt issuance costs	(1.5)	(8.5)	听	听
Gain (Loss) on Repurchase of Debt Instrument	听	(1,115.5)	听	听
Distributions of partnership equity	听	0.0	听	听
Intercompany financing	0.0	45.1	听	听
Other financing activities	(1.4)	(0.5)	听	听
Net Cash Provided by (Used in) Financing Activities	(2.9)	81.9	听	听
EFFECT OF EXCHANGE RATE CHANGES ON CASH	0.0	0.0	听	听
Cash and Cash Equivalents, Period Increase (Decrease)	(195.3)	(74.9)	听	听
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale	753.6	208.5	948.9	283.4
Reportable Legal Entities [Member] \| Guarantor Subsidiaries [Member]	听	听	听	听
Net Cash Provided by (Used in) Operating Activities	(62.8)	(19.7)	听	听
Property, Plant and Equipment, Cash Additions	(8.1)	(24.9)	听	听
Purchase of property, plant and equipment	(0.8)	(2.0)	听	听
Intercompany investments	(4.8)	(0.5)	听	听
Other investing activities	听	0.5	听	听
Net Cash Provided by (Used in) Investing Activities	(13.7)	(26.9)	听	听
Net proceeds from issuance of common shares	听	0.0	听	听
Proceeds from issuance of debt	听	0.0	听	听
Debt issuance costs	0.0	0.0	听	听
Gain (Loss) on Repurchase of Debt Instrument	听	0.0	听	听
Distributions of partnership equity	听	(8.7)	听	听
Intercompany financing	75.9	55.8	听	听
Other financing activities	(0.5)	(0.7)	听	听
Net Cash Provided by (Used in) Financing Activities	75.4	46.4	听	听
EFFECT OF EXCHANGE RATE CHANGES ON CASH	0.0	0.0	听	听
Cash and Cash Equivalents, Period Increase (Decrease)	(1.1)	(0.2)	听	听
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale	1.0	2.3	2.1	2.5
Reportable Legal Entities [Member] \| Non-Guarantor Subsidiaries [Member]	听	听	听	听
Net Cash Provided by (Used in) Operating Activities	(25.4)	94.1	听	听
Property, Plant and Equipment, Cash Additions	(4.3)	(0.2)	听	听
Purchase of property, plant and equipment	(58.2)	0.0	听	听
Intercompany investments	0.0	(45.0)	听	听
Other investing activities	听	0.0	听	听
Net Cash Provided by (Used in) Investing Activities	(62.5)	(45.2)	听	听
Net proceeds from issuance of common shares	听	0.0	听	听
Proceeds from issuance of debt	听	0.0	听	听
Debt issuance costs	0.0	0.0	听	听
Gain (Loss) on Repurchase of Debt Instrument	听	0.0	听	听
Distributions of partnership equity	听	0.0	听	听
Intercompany financing	66.6	1.1	听	听
Other financing activities	(3.6)	(4.4)	听	听
Net Cash Provided by (Used in) Financing Activities	63.0	(3.3)	听	听
EFFECT OF EXCHANGE RATE CHANGES ON CASH	0.2	1.4	听	听
Cash and Cash Equivalents, Period Increase (Decrease)	(24.7)	47.0	听	听
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale	32.0	84.5	56.7	37.5
Consolidation, Eliminations [Member]	听	听	听	听
Net Cash Provided by (Used in) Operating Activities	0.0	0.0	听	听
Property, Plant and Equipment, Cash Additions	0.0	0.0	听	听
Purchase of property, plant and equipment	0.0	0.0	听	听
Intercompany investments	142.5	102.0	听	听
Other investing activities	听	0.0	听	听
Net Cash Provided by (Used in) Investing Activities	142.5	102.0	听	听
Net proceeds from issuance of common shares	听	0.0	听	听
Proceeds from issuance of debt	听	0.0	听	听
Debt issuance costs	0.0	0.0	听	听
Gain (Loss) on Repurchase of Debt Instrument	听	0.0	听	听
Distributions of partnership equity	听	0.0	听	听
Intercompany financing	(142.5)	(102.0)	听	听
Other financing activities	0.0	0.0	听	听
Net Cash Provided by (Used in) Financing Activities	(142.5)	(102.0)	听	听
EFFECT OF EXCHANGE RATE CHANGES ON CASH	0.0	0.0	听	听
Cash and Cash Equivalents, Period Increase (Decrease)	0.0	0.0	听	听
Cash And Cash Equivalents, At Carrying Value, Including Assets Held For Sale	$ 0.0	$ 0.0	$ 0.0	$ 0.0