Quarterly Financial Information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,052.7	$ 1,098.2	$ 1,097.6	$ 1,095.0	$ 1,085.3	$ 1,121.5	$ 1,155.3	$ 1,114.5	$ 4,343.5	$ 4,476.6	$ 4,583.6
Gross profit	208.5	220.7	219.0	210.9	207.4	224.2	226.6	217.2	859.1	875.4	851.7
Income (loss) from continuing operations	57.2	61.5	60.7	59.7	50.3	48.9	49.1	44.2	239.1	192.5	148.9
Income (loss) from discontinued operations, net of tax	1.9	(44.5)	5.1	(10.5)	5.9	5.1	4.0	5.1	(48.0)	20.1	24.9
Net income	$ 59.1	$ 17.0	$ 65.8	$ 49.2	$ 56.2	$ 54.0	$ 53.1	$ 49.3	$ 191.1	$ 212.6	$ 173.8
Income from continuing operations, per basic share	$ 0.58	$ 0.62	$ 0.61	$ 0.58	$ 0.49	$ 0.47	$ 0.47	$ 0.43	$ 2.39	$ 1.86	$ 1.43
Income (loss) from discontinued operations, per basic share	$ 0.02	$ (0.45)	$ 0.05	$ (0.10)	$ 0.06	$ 0.05	$ 0.04	$ 0.05	$ (0.48)	$ 0.20	$ 0.24
Basic earnings per share, net income	$ 0.60	$ 0.17	$ 0.66	$ 0.48	$ 0.55	$ 0.52	$ 0.51	$ 0.48	$ 1.91	$ 2.06	$ 1.67
Income from continuing operations, per diluted share	$ 0.57	$ 0.61	$ 0.60	$ 0.58	$ 0.49	$ 0.47	$ 0.47	$ 0.42	$ 2.36	$ 1.85	$ 1.42
Income (loss) from discontinued operations, per diluted share	$ 0.02	$ (0.44)	$ 0.05	$ (0.10)	$ 0.05	$ 0.05	$ 0.04	$ 0.05	$ (0.47)	$ 0.19	$ 0.24
Diluted earnings per share, net income	$ 0.59	$ 0.17	$ 0.65	$ 0.48	$ 0.54	$ 0.52	$ 0.51	$ 0.47	$ 1.89	$ 2.04	$ 1.66