Equity Stock Repurchase Program (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended		51 Months Ended			3 Months Ended	52 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Jul. 09, 2014	Dec. 31, 2013	Dec. 31, 2014 Subsequent Event [Member]	Nov. 05, 2014 Subsequent Event [Member]
Equity [Abstract]
Treasury stock, shares (in shares)	98,496,142	98,496,142		98,496,142		90,808,168
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares	7,378,387			93,696,331			2,960,908	96,657,239
Stock Repurchased During Period, Value	$ 108.0	$ 140.0	$ 63.0	$ 1,100.0			$ 42.0	$ 1,200.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	192	192		192	52			150
Treasury Stock Acquired, Average Cost Per Share				$ 12.18				$ 12.25
Stock repurchase program, additional authorized amount	$ 140