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

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]	听	听
Balance, beginning of period	$ 424.2	听
Balance, beginning of period PY	听	$ (444.1)
Balance, end of period	261.7	听
Balance, end of period PY	听	(484.8)
Changes in Pension and Other Post-Retirement Benefits, net of tax [Member]	听	听
AOCI Attributable to Parent, Net of Tax [Roll Forward]	听	听
Balance, beginning of period	(281.1)	听
Balance, beginning of period PY	听	(263.9)
Other comprehensive income (loss) before reclassifications	0.2	0.5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	5.5	6.2
Balance, end of period	(275.4)	听
Balance, end of period PY	听	(257.2)
Unrealized Net Gain (Loss) on Foreign Currency Translation [Member]	听	听
AOCI Attributable to Parent, Net of Tax [Roll Forward]	听	听
Balance, beginning of period PY	听	225.4
Other comprehensive income (loss) before reclassifications	听	0.7
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	听	0.0
Balance, end of period PY	听	226.1
Net Unrealized Gain (Loss) on Derivative Financial Instruments, net of tax [Member]	听	听
AOCI Attributable to Parent, Net of Tax [Roll Forward]	听	听
Balance, beginning of period	(2.8)	听
Balance, beginning of period PY	听	(0.5)
Other comprehensive income (loss) before reclassifications	2.5	0.4
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.2	(0.1)
Balance, end of period	(0.1)	听
Balance, end of period PY	听	(0.2)
Accumulated Other Comprehensive Income (Loss) [Member]	听	听
AOCI Attributable to Parent, Net of Tax [Roll Forward]	听	听
Balance, beginning of period	(283.9)	听
Balance, beginning of period PY	听	(39.0)
Other comprehensive income (loss) before reclassifications	2.7	1.6
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	5.7	6.1
Balance, end of period	$ (275.5)	听
Balance, end of period PY	听	$ (31.3)