Shareholders' Equity Repurchase Activity (Details) (USD $) Share data in Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Mar. 31, 2014	Jun. 30, 2014	Jun. 30, 2013	Jul. 15, 2014
Repurchase Activity [Abstract]
Number of shares repurchased	8.9
Stock Repurchase Program, Repurchase Authorization Increase				$ 4,800,000,000
Shares repurchased	(500,000,000)	(500,000,000)	(1,050,000,000)
Stock Repurchase Program, Remaining Authorized Repurchase Amount		6,000,000,000
Treasury Stock Shares Acquired From Inception		197
Treasury Stock Value Acquired Cost Method From Inception		$ 8,100,000,000