Equity Stock Repurchase Program (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended			3 Months Ended	48 Months Ended	1 Months Ended	49 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 2010 Stock Repurchase Program [Member]	Jun. 30, 2014 2010 Stock Repurchase Program [Member]	Aug. 06, 2014 Subsequent Event [Member] 2010 Stock Repurchase Program [Member]	Aug. 06, 2014 Subsequent Event [Member] 2010 Stock Repurchase Program [Member]
Equity [Abstract]
Treasury stock, shares (in shares)	91,126,094		90,808,168
Equity, Class of Treasury Stock [Line Items]
Stock Repurchased During Period, Shares				2,305,713	86,317,944	1,065,700	87,383,644
Stock Repurchased During Period, Value	$ 32.0	$ 18.0		$ 32.0	$ 1,000.0	$ 15.6	$ 1,000.0
Stock Repurchase Program, Remaining Authorized Repurchase Amount				$ 159
Treasury Stock Acquired, Average Cost Per Share					$ 11.98		$ 12.01