CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, unless otherwise specified	Total	Preferred stock par value	Preferred stock additional capital paid-in	Common stock	Additional capital paid-in	Retained income	Deferred ESOP expense	Treasury stock	Accumulated other comprehensive income	Noncontrolling interest
Balance, beginning of year at Dec. 31, 2011					$ 3,189	$ 31,909	$ (43)	$ (16,795)	$ 29	$ 28
Increase (decrease) in equity
Equity incentive plans activity					(35)
Preferred stock issuance
Net income	1,912					1,912
Dividends on common stock						(325)
Payments							2
Shares acquired								(728)
Shares reissued under equity incentive plans, net								155
Change in unrealized net capital gains and losses	1,480								1,480
Change in unrealized foreign currency translation adjustments	14								14
Change in unrecognized pension and other postretirement benefit cost	64								64
Change in noncontrolling interest ownership										(28)
Balance, end of year at Sep. 30, 2012	20,837			9	3,154	33,496	(41)	(17,368)	1,587
Balance, beginning of year at Dec. 31, 2012					3,162	33,783	(41)	(17,508)	1,175
Increase (decrease) in equity
Equity incentive plans activity					(35)
Preferred stock issuance			650
Net income	1,459					1,459
Dividends on common stock						(351)
Dividends on preferred stock						(6)
Payments							2
Shares acquired								(1,395)
Shares reissued under equity incentive plans, net								241
Change in unrealized net capital gains and losses	(1,120)								(1,120)
Change in unrealized foreign currency translation adjustments	(20)								(20)
Change in unrecognized pension and other postretirement benefit cost	775								775
Balance, end of year at Sep. 30, 2013	$ 20,780		$ 650	$ 9	$ 3,127	$ 34,885	$ (39)	$ (18,662)	$ 810