Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (154.6)	$ 92.2	$ 12.4	$ 165.1
Other comprehensive income (loss):
Foreign currency translation adjustments	86.5	(74.0)	81.0	(63.0)
Change in fair value of derivative financial instruments, net of tax	(2.3)	31.6	(12.4)	36.0
Change in post-retirement and pension liability, net of tax	(1.2)	(0.5)	(4.3)	(1.0)
Other comprehensive income (loss), net of tax	83.0	(42.9)	64.3	(28.0)
Comprehensive income (loss)	$ (71.6)	$ 49.3	$ 76.7	$ 137.1