Consolidated and Combined Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Preferred Stock	Additional Paid-In Capital	Retained Earnings	Former Parent’s Investment, Net	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Accumulated other comprehensive income (loss), beginning of period at Dec. 31, 2015		$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 5,193.9	$ (14.4)	$ 3.0
Preferred stock outstanding, beginning of period (in shares) at Dec. 31, 2015			0.0
Common stock outstanding, beginning of period (in shares) at Dec. 31, 2015		0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	$ 872.3				451.4	420.9
Recapitalization		$ 3.5				(3.5)
Recapitalization (in shares)		345.2
Cash dividend paid to Former Parent						(3,000.0)
Dividends to common shareholders					(48.4)
Net transfers to Former Parent	301.4					(301.4)
Non-cash adjustment to Net former Parent investment				2,381.3		(2,332.3)
Other comprehensive income (loss)	(131.4)						(131.4)
Common stock-based award activity				45.9		22.4
Common stock-based award activity (in shares)		0.7
Issuance of mandatory convertible preferred stock	0.0
Changes in noncontrolling interests								0.1
Accumulated other comprehensive income (loss), beginning of period at Dec. 31, 2016		$ 3.5	$ 0.0	2,427.2	403.0	0.0	(145.8)	3.1
Preferred stock outstanding, end of period (in shares) at Dec. 31, 2016			0.0
Common stock outstanding, end of period (in shares) at Dec. 31, 2016		345.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	1,044.5				1,044.5
Dividends to common shareholders	(97.2)				(97.2)
Net transfers to Former Parent	0.0
Non-cash adjustment to Net former Parent investment				(50.2)
Other comprehensive income (loss)	138.2						138.2
Common stock-based award activity				67.1
Common stock-based award activity (in shares)		1.9
Issuance of mandatory convertible preferred stock	0.0
Changes in noncontrolling interests								14.8
Accumulated other comprehensive income (loss), beginning of period at Dec. 31, 2017	$ 3,808.2	$ 3.5	$ 0.0	2,444.1	1,350.3	0.0	(7.6)	17.9
Preferred stock outstanding, end of period (in shares) at Dec. 31, 2017	0.0		0.0
Common stock outstanding, end of period (in shares) at Dec. 31, 2017	347.8	347.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings for the period	$ 2,913.8				2,913.8
Dividends to common shareholders	(96.6)				(96.6)
Mandatory convertible preferred stock cumulative dividends					(34.9)
Net transfers to Former Parent	0.0
Non-cash adjustment to Net former Parent investment				9.1
Other comprehensive income (loss)	(123.7)						(123.7)
Common stock-based award activity		$ 0.1		95.7
Common stock-based award activity (in shares)		2.5
Issuance of mandatory convertible preferred stock	1,337.4			1,337.0
Issuance of mandatory convertible preferred stock (in shares)			1.4
Split-off of A&S Business		$ (0.2)		(759.9)	(576.0)		44.7
Split-off of A&S Business (in shares)		(15.8)
Changes in noncontrolling interests								(0.5)
Accumulated other comprehensive income (loss), beginning of period at Dec. 31, 2018	$ 6,612.9	$ 3.4	$ 0.0	$ 3,126.0	$ 3,552.7	$ 0.0	$ (86.6)	$ 17.4
Preferred stock outstanding, end of period (in shares) at Dec. 31, 2018	1.4		1.4
Common stock outstanding, end of period (in shares) at Dec. 31, 2018	334.5	334.5