Shareholders' Equity Repurchase Activity (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended		2 Months Ended	9 Months Ended
	Aug. 31, 2013	Jul. 31, 2013	Sep. 30, 2013	Sep. 30, 2013	Jul. 18, 2013
Repurchase Activity [Abstract]
Treasury Stock Acquired, Average Cost Per Share	$ 48.50			$ 47.02
Stock Repurchase Program, Authorization Amount Increase					$ 4,300,000,000
Number of shares repurchased	68			93
Shares repurchased	3,300,000,000			4,356,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 5,000,000,000	$ 1,700,000,000