Schedule of Share Based Compensation Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic Value of Stock Options Exercised	$ 9.4	$ 7.3	$ 41.7	$ 44.5
Stock Compensation Expense Related to Stock Option Awards	$ 1.7	$ 1.7	$ 13.1	$ 13.5
Issued Stock Options	0.0	0.0	1.1	1.1
Weighted Average Fair Value of Stock Options issued (per share)	$ 13.27	$ 12.76	$ 13.73	$ 12.84
Fair Value of Stock Options Issued	$ 0.0	$ 0.1	$ 14.8	$ 14.7