Earnings Per Share, Share Repurchases and Dividends on Common Stock (Unaudited) (Details 1) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		7 Months Ended	9 Months Ended		10 Months Ended	29 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2015	Sep. 16, 2015	Dec. 04, 2014	May. 15, 2013
May 2013 Share Repurchase Program Original Authorization
Share Repurchase [Line Items]
Amount Authorized									$ 4,000
Shares Retired						32.8
Average Cost Per Share						$ 121.97
Shares Repurchased			2.7	16.9
December 2014 Share Repurchase Program Original Authorization
Share Repurchase [Line Items]
Amount Authorized								$ 3,000
Shares Retired					15.0
Average Cost Per Share					$ 162.89
Shares Repurchased			15.0	0.0
Share Repurchases - Notes to Table
Shares repurchased amount		$ 2,400
Amount remaining under authorization for share repurchases	$ 600	$ 600	$ 600		$ 600	$ 600
September 2015 Share Repurchase Program Original Authorization
Share Repurchase [Line Items]
Amount Authorized							$ 4,000
Shares Retired	0.0
Average Cost Per Share	$ 0.00
Shares Repurchased			0.0	0.0