Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Comprehensive Income (Loss), Reclassification and Amortization, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) and Net Prior Service Cost Recognized, Net of Tax		$ 3.6	$ 10.8	$ 10.8	$ 26.8
Net loss		(133.7)	(301.9)	(532.6)	(1,518.7)
Other comprehensive income, net of income taxes
Net change in unrealized gains on available-for-sale securities (net of respective net tax provision (benefit) of $0.0, $0.0, $0.0 and ($0.1))		0.0	0.2	0.0	0.2
Net unrealized gains on cash flow hedges (net of respective net tax provision of $23.1, $81.0, $52.3 and $79.8)
Decrease in fair value of cash flow hedges		0.0	(115.6)	0.0	(100.4)
Reclassification for realized losses included in net loss	[1]	29.9	68.9	119.0	183.9
Net unrealized gains (losses) on cash flow hedges		29.9	(46.7)	119.0	83.5
Foreign currency translation adjustment		1.5	(15.3)	2.4	(41.5)
Other comprehensive income (loss), net of income taxes		35.0	(51.0)	132.2	69.0
Comprehensive loss		(98.7)	(352.9)	(400.4)	(1,449.7)
Less: Comprehensive income attributable to noncontrolling interests		1.8	2.8	3.5	7.9
Comprehensive loss attributable to common stockholders		$ (100.5)	$ (355.7)	$ (403.9)	$ (1,457.6)

[1] Presented as gains (losses) in the unaudited condensed consolidated statements of operations.