Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (37.3)	$ 11.7	$ (193.2)	$ (2.9)
Other comprehensive income (loss), net of tax:
Designated hedge gains (losses)	10.0	(27.7)	(89.0)	(111.0)
Defined benefit plan actuarial gain (loss)	(0.1)	0.2	1.9	0.2
Foreign currency translation	41.2	(34.4)	19.6	(32.9)
Total other comprehensive income (loss)	51.1	(61.9)	(67.5)	(143.7)
Total comprehensive income (loss)	$ 13.8	$ (50.2)	$ (260.7)	$ (146.6)