Summarized Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended								12 Months Ended
	Sep. 06, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Net sales		$ 1,260.3	$ 1,186.2	$ 1,155.2	$ 1,131.0	$ 1,227.8	$ 1,131.3	$ 1,070.3	$ 1,032.2	$ 4,732.7	$ 4,461.6	$ 4,211.3
Gross profit		399.1	365.5	363.5	374.0	372.5	360.7	343.5	335.4	1,502.1	1,412.1	1,401.0
Net (loss) earnings from continuing operations		199.4	75.6	83.3	(208.0)	25.0	62.5	29.0	(53.7)	150.3	62.8	292.3
Gain (loss) on sale of discontinued operations, net of tax	$ 640.7	0.9	3.4	31.1	7.4	(58.6)	699.3	0.0	0.0	42.8	640.7	0.0
Net earnings from discontinued operations, net of tax						0.1	25.7	75.1	10.5	0.0	111.4	194.1
Net earnings		$ 200.3	$ 79.0	$ 114.4	$ (200.6)	$ (33.5)	$ 787.5	$ 104.1	$ (43.2)	$ 193.1	$ 814.9	$ 486.4
Continuing operations (in dollars per share)		$ 1.28	$ 0.48	$ 0.52	$ (1.25)	$ 0.14	$ 0.33	$ 0.14	$ (0.27)	$ 0.94	$ 0.34	$ 1.50
Discontinued operations (in dollars per share)		0.01	0.02	0.19	0.04	(0.33)	3.86	0.39	0.05	0.27	3.99	0.99
Net earnings per common share - basic (in dollars per share)		1.29	0.50	0.71	(1.21)	(0.19)	4.19	0.53	(0.22)	1.21	4.33	2.49
Continuing operations (in dollars per share)		1.28	0.48	0.52	(1.25)	0.14	0.33	0.14	(0.27)	0.94	0.33	1.48
Discontinued operations (in dollars per share)		0.00	0.02	0.19	0.04	(0.33)	3.82	0.38	0.05	0.26	3.96	0.98
Net earnings per common share - diluted (in dollars per share)		$ 1.28	$ 0.50	$ 0.71	$ (1.21)	$ (0.19)	$ 4.15	$ 0.52	$ (0.22)	$ 1.20	$ 4.29	$ 2.46