Schedule Of Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Selected Quarterly Financial Information [Abstract]
Net Sales	$ 873.6		$ 861.8		$ 847.1		$ 812.3		$ 865.5		$ 841.8		$ 808.3		$ 782.0		$ 3,394.8		$ 3,297.6		$ 3,194.3
Gross profit	397.4		385.8		373.1		355.5		389.6		367.5		356.4		339.4		1,511.8		1,452.9		1,438.0
Income from Operations	169.2	[1]	190.6	[1]	142.3	[1]	172.1	[1]	163.8	[2]	177.2	[2]	138.2	[2]	162.0	[2]	674.2	[1]	641.2	[2]	$ 622.2
Net Income	$ 109.1		$ 120.4		$ 73.7		$ 107.2		$ 106.6		$ 115.9		$ 88.8		$ 102.6		$ 410.4		$ 413.9
Net Income per share - Basic, Reported	$ 0.84	[1],[3]	$ 0.92	[1],[3]	$ 0.56	[1],[3]	$ 0.81	[1],[3]	$ 0.80		$ 0.87		$ 0.66		$ 0.74		$ 3.13	[1],[3]	$ 3.06		$ 2.85
Net Income per share - Diluted, Reported	$ 0.82	[1],[3]	$ 0.90	[1],[3]	$ 0.55	[1],[3]	$ 0.80	[1],[3]	$ 0.78		$ 0.85		$ 0.65		$ 0.73		$ 3.07	[1],[3]	$ 3.01		$ 2.79

[1] The second quarter of 2015 Income from Operations includes an $8.9 pre-tax charge or $0.05 per share to terminate an international defined benefit pension plan.

[2] The second quarter of 2014 Income from Operations includes $5.0 of intangible asset impairment charges.

[3] The second quarter of 2015 Net Income includes a $17.0 or $0.13 per share impairment charge to write-off the remaining investment in Natronx.