Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income Tax Expense (Benefit)	$ 532.6	$ 408.8	$ 971.3	$ 819.0
Effective tax rate	42.10%	33.80%	40.60%	32.90%