Summarized Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
	Sep. 06, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Quarterly Financial Information Disclosure [Abstract]
Net sales		$ 1,298.9	$ 1,218.5	$ 1,161.0	$ 1,112.7	$ 1,260.3	$ 1,186.2	$ 1,155.2	$ 1,131.0	$ 4,791.1	$ 4,732.7	$ 4,461.6
Gross profit		429.3	392.0	378.3	365.2	399.1	365.5	363.5	374.0	1,564.8	1,502.1	1,412.1
Net earnings from continuing operations		124.4	79.5	25.5	64.3	199.4	75.6	83.3	(208.0)	293.7	150.3	62.8
Gain on sale of discontinued operations, net of tax	$ 640.7	(20.1)	(11.5)	7.7	(6.8)	0.9	3.4	31.1	7.4	(30.7)	42.8	640.7
Net earnings		$ 104.3	$ 68.0	$ 33.2	$ 57.5	$ 200.3	$ 79.0	$ 114.4	$ (200.6)	$ 263.0	$ 193.1	$ 814.9
Continuing operations (in dollars per share)		$ 0.81	$ 0.52	$ 0.16	$ 0.41	$ 1.28	$ 0.48	$ 0.52	$ (1.25)	$ 1.90	$ 0.94	$ 0.34
Discontinued operations (in dollars per share)		(0.13)	(0.08)	0.06	(0.04)	0.01	0.02	0.19	0.04	(0.20)	0.27	3.99
Net earnings per common share - basic (in dollars per share)		0.68	0.44	0.22	0.37	1.29	0.50	0.71	(1.21)	1.70	1.21	4.33
Continuing operations (in dollars per share)		0.80	0.51	0.16	0.41	1.28	0.48	0.52	(1.25)	1.89	0.94	0.33
Discontinued operations (in dollars per share)		(0.13)	(0.07)	0.05	(0.04)	0	0.02	0.19	0.04	(0.20)	0.26	3.96
Net earnings per common share - diluted (in dollars per share)		$ 0.67	$ 0.44	$ 0.21	$ 0.37	$ 1.28	$ 0.50	$ 0.71	$ (1.21)	$ 1.69	$ 1.20	$ 4.29