Income Taxes Income Tax (Refunds) Payments, Net (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 01, 2017	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	$ 5.5	$ (0.8)	$ (9.1)	$ (64.0)
U.S. — federal
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	0.0	(11.2)	(45.7)	(103.1)
U.S. — state and local
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	0.0	0.0	0.3	(1.6)
Non-U.S.
Total income tax (refunds) payments, net [Line Items]
Total income tax (refunds) payments, net	$ 5.5	$ 10.4	$ 36.3	$ 40.7