Capital Transactions (Details 2) (USD $) In Millions, except Per Share data, unless otherwise specified	0 Months Ended				3 Months Ended		9 Months Ended
	May 30, 2014	May 14, 2014	May 31, 2013	May 15, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Dividends
Dividends per common share (in dollars per share)					$ 0	$ 0	$ 0.20	$ 0.19
Cash dividend payment		$ 143		$ 212			$ 147	$ 216
Dividend equivalent payment	$ 4		$ 4