Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Net (loss) income	$ (211.7)	$ 693.3	$ (185.1)	$ 663.8
Other comprehensive income, net of income taxes:
Reclassification for realized losses on cash flow hedges (net of respective net tax provision of $0.0, $0.0, $0.0, and $9.1) included in net (loss) income	18.6	0.0	0.0	0.0
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	18.6
Postretirement plans and workers’ compensation obligations (net of respective net tax provision of $0.0, $7.1, $0.0, and $2.5)	4.4	0.0	(8.7)	44.6
Postretirement plans and workers’ compensation obligations	4.4		(8.7)	44.6
Foreign currency translation adjustment	5.5	1.4	0.2	(5.9)
Other comprehensive (loss) income, net of income taxes	28.5	1.4	(8.5)	38.7
Comprehensive (loss) income	(183.2)	694.7	(193.6)	702.5
Less: Series A Convertible Preferred Stock dividends	0.0	179.5	0.0	102.5
Less: Net income attributable to noncontrolling interests	4.8	15.2	26.2	16.9
Comprehensive (loss) income attributable to common stockholders	$ (188.0)	$ 500.0	$ (219.8)	$ 583.1