Quarterly Financial Information (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Quarter Ended
(in millions, except per share amounts)	March 31		June 30		September 30		December 31			Total
2018
Net sales	$	1,027.4	$	1,033.3	$	1,026.4	$	1,002.8		$	4,089.9
Gross profit	198.0		201.7		205.0		200.4			805.1
Net income	47.6		46.7		57.5		73.9			225.7
Basic earnings per share:
Net income	0.52		0.51		0.63		0.82			2.48
Diluted earnings per share:
Net income	0.52		0.51		0.63		0.81			2.47
2017
Net sales	$	995.4	$	1,012.1	$	1,035.1	$	1,003.6		$	4,046.2
Gross profit	198.3		186.1		208.0		193.8			786.2
Net income	51.1		28.0		55.6		(40.7		)	94.0
Basic earnings per share:
Net income	0.55		0.31		0.61		(0.44		)	1.03
Diluted earnings per share:
Net income	0.55		0.30		0.61		(0.44		)	1.02