Shareholders' Equity - Treasury Stock (Details) (USD $) Share data in Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity, Class of Treasury Stock [Line Items]
Authorized share repurchase programs	$ 6,500,000,000
Share repurchase cost	5,386,000,000
Share repurchase fees	9,000,000
Number of shares repurchased	493,492
Share Repurchase Program, Additional Amount Authroized to be Repurchased	500,000,000
Share Repurchase Program Combined Authorizaiton	6,500,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 1,100,000,000
Treasury Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased	65,179	146,278	87,943
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased	0	0	0