Earnings Per Share, Share Repurchases and Dividends on Common Stock #1 (Unaudited) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended		7 Months Ended	26 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2015	Dec. 04, 2014	May. 15, 2013
May 2013 Share Repurchase Program Original Authorization
Share Repurchase [Line Items]
Amount Authorized						$ 4,000
Total Shares Retired				32.8
Average Cost Per Share				$ 121.97
Shares Repurchased	2.7	10.9
December 2014 Share Repurchase Original Authorization [Domain]
Share Repurchase [Line Items]
Amount Authorized					$ 3,000
Total Shares Retired			9.4
Average Cost Per Share			$ 160.34
Shares Repurchased	9.4	0.0
Share Repurchases - Notes to Table
Shares repurchased amount	$ 1,500		$ 1,500	$ 1,500
Amount remaining under authorization for share repurchases	$ 1,500		$ 1,500	$ 1,500