Net Earnings Per Share - Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Numerator
Net earnings from continuing operations	$ 225.8	$ 207.3	$ 398.4	$ 546.6
Mandatory convertible preferred stock cumulative dividends	(17.3)	(17.3)	(51.8)	(51.8)
Net earnings attributable to common stockholders from continuing operations	$ 208.5	$ 190.0	$ 346.6	$ 494.8
Denominator
Weighted average common shares outstanding used in basic earnings per share (in shares)	337.6	336.1	337.3	335.6
Incremental common shares from:
Assumed exercise of dilutive options and vesting of dilutive Stock Awards (in shares)	3.2	3.8	2.9	4.1
Weighted average common shares outstanding used in diluted earnings per share (in shares)	340.8	339.9	340.2	339.7
Net earnings per common share from continuing operations - basic (in dollars per share)	$ 0.62	$ 0.57	$ 1.03	$ 1.47
Net earnings per common share from continuing operations - diluted (in dollars per share)	$ 0.61	$ 0.56	$ 1.02	$ 1.46