Combined Condensed Statements of Changes in Equity - USD ($) $ in Millions	Total	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Net Parent Investment	Net Parent Investment Cumulative Effect, Period of Adoption, Adjustment	Net Parent Investment Cumulative Effect, Period of Adoption, Adjusted Balance	Noncontrolling Interests	Noncontrolling Interests Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance at Dec. 31, 2018		$ 126.3		$ 1,663.5			$ 3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period				76.4
Net transfers to Parent				(47.1)
Other comprehensive income (loss)		2.6
Stock-based compensation expense				2.8
Change in noncontrolling interests							0.4
Ending balance at Mar. 29, 2019		128.9		1,695.6			3.5
Beginning balance at Dec. 31, 2018		126.3		1,663.5			3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	$ 310.3
Other comprehensive income (loss)	(9.8)
Ending balance at Sep. 27, 2019		116.5		1,554.7			4.2
Beginning balance at Mar. 29, 2019		128.9		1,695.6			3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period				112.9
Net transfers to Parent				(110.5)
Other comprehensive income (loss)		3.3
Stock-based compensation expense				3.4
Ending balance at Jun. 28, 2019		132.2		1,701.4			3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	121.0			121.0
Net transfers to Parent				(127.1)
Non-cash settlement of net related-party borrowings				(144.2)
Other comprehensive income (loss)	(15.7)	(15.7)
Stock-based compensation expense				3.6
Change in noncontrolling interests							0.7
Ending balance at Sep. 27, 2019		116.5		1,554.7			4.2
Beginning balance at Dec. 31, 2019	1,816.1	148.7	$ 148.7	1,662.5	$ (16.9)	$ 1,645.6	4.9	$ 4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period				(4.2)
Net transfers to Parent				(13.1)
Non-cash settlement of net related-party borrowings				(1.0)
Other comprehensive income (loss)		(44.5)
Stock-based compensation expense				3.6
Change in noncontrolling interests							(1.1)
Ending balance at Mar. 27, 2020		104.2		1,630.9			3.8
Beginning balance at Dec. 31, 2019	1,816.1	148.7	$ 148.7	1,662.5	$ (16.9)	$ 1,645.6	4.9	$ 4.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	205.2
Other comprehensive income (loss)	(11.4)
Ending balance at Sep. 25, 2020	1,587.4	137.3		1,445.8			4.3
Beginning balance at Mar. 27, 2020		104.2		1,630.9			3.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period				68.4
Net transfers to Parent				(170.1)
Non-cash settlement of net related-party borrowings				0.2
Other comprehensive income (loss)		18.7
Stock-based compensation expense				6.0
Change in noncontrolling interests							0.5
Ending balance at Jun. 26, 2020		122.9		1,535.4			4.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	141.0			141.0
Net transfers to Parent				(236.7)
Other comprehensive income (loss)	14.4	14.4
Stock-based compensation expense				6.1
Ending balance at Sep. 25, 2020	$ 1,587.4	$ 137.3		$ 1,445.8			$ 4.3