Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 92.2	$ (67.5)	$ 165.1	$ 49.6
Other comprehensive income (loss):
Foreign currency translation adjustments	(74.0)	(9.9)	(63.0)	(102.5)
Change in fair value of derivative financial instruments, net of tax	31.6	(0.9)	36.0	(5.0)
Change in post-retirement and pension liability, net of tax	(0.5)	(1.0)	(1.0)	(1.4)
Other comprehensive income (loss), net of tax	(42.9)	(11.8)	(28.0)	(108.9)
Comprehensive income (loss)	$ 49.3	$ (79.3)	$ 137.1	$ (59.3)