Earnings Per Share, Share Repurchases and Dividends on Common Stock #1 (Unaudited) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended		39 Months Ended		0 Months Ended	3 Months Ended				10 Months Ended
	Mar. 31, 2014 June 2010 Share Repurchase Program Original Authorization	Mar. 31, 2013 June 2010 Share Repurchase Program Original Authorization	Sep. 30, 2013 June 2010 Share Repurchase Program Original Authorization		May 15, 2013 May 2013 Share Repurchase Program Original Authorization	Mar. 31, 2014 May 2013 Share Repurchase Program Original Authorization		Mar. 31, 2013 May 2013 Share Repurchase Program Original Authorization		Mar. 31, 2014 May 2013 Share Repurchase Program Original Authorization
Share Repurchase [Line Items]
Amount Authorized			$ 5,350,000,000		$ 4,000,000,000					$ 4,000,000,000	[1]
Total Shares Retired			83.7							13.5	[1]
Average Cost Per Share			$ 63.86	[2]						$ 108.59	[1]
Shares Repurchased	0	6.5				4.8	[1]	0	[1]
Share Repurchases - Notes to Table
Shares repurchased amount						1,500,000,000				1,500,000,000
Amount remaining under authorization for share repurchases						$ 2,500,000,000				$ 2,500,000,000

[1] On May 15, 2013, the company's board of directors authorized a share repurchase program of up to $4.0 billion of the company’s common stock. Repurchases under this program commenced in September 2013 upon the completion of the company's 2010 repurchase program. As of March 31, 2014, our repurchases under the program totaled $1.5 billion and $2.5 billion remained under this share repurchase authorization.The repurchase program is expected to expire when we have used all authorized funds for repurchase.

[2] Includes commissions paid.