Schedule of Share Based Compensation Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Intrinsic Value of Stock Options Exercised	$ 8.5	$ 20.9	$ 32.3	$ 37.2
Stock Compensation Expense Related to Stock Option Awards	$ 9.7	$ 9.7	$ 11.4	$ 11.8
Issued Stock Options	1.1	1.1	1.1	1.1
Weighted Average Fair Value of Stock Options issued (per share)	$ 13.73	$ 12.84	$ 13.73	$ 12.84
Fair Value of Stock Options Issued	$ 14.8	$ 14.6	$ 14.8	$ 14.6