Capital Transactions (Details) - USD ($)		12 Months Ended
	Oct. 11, 2013	Dec. 31, 2015	Dec. 31, 2013	Feb. 03, 2015
Equity, Class of Treasury Stock [Line Items]
Shares of common stock repurchased	429,000,000
Cost of common stock repurchased under the stock repurchase program			$ 5,830,000,000
Share Repurchase Program 2015
Equity, Class of Treasury Stock [Line Items]
Shares of common stock repurchased		0
Cost of common stock repurchased under the stock repurchase program		$ 0
Stock repurchase program, dollar amount authorized				$ 750,000,000