Equity Equity (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Feb. 01, 2014
Equity [Abstract]
Stock Repurchase Program, Authorized Amount			$ 1,500.0
Treasury Stock, Shares, Acquired	4.1
Payments for Repurchase of Common Stock	$ 233.4	$ 1,172.9
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 700.0