CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $) In Millions, except Per Share data, unless otherwise specified	Total USD ($)	Preferred Stock	Preferred stock additional capital paid-in USD ($)	Common stock USD ($)	Additional capital paid-in USD ($)	Retained income USD ($)	Deferred ESOP expense USD ($)	Treasury stock USD ($)	Accumulated other comprehensive income USD ($)
Balance, beginning of period at Dec. 31, 2013			$ 780		$ 3,143	$ 35,580	$ (31)	$ (19,047)	$ 1,046
Increase (decrease) in equity
Preferred stock, par value (in dollars per share)		0
Preferred stock issuance			725
Forward contract on accelerated share repurchase agreement					(113)
Equity incentive plans activity					(13)
Net income	600					600
Dividends on common stock						(126)
Dividends on preferred stock						(13)
Payments							0
Shares acquired								(987)
Shares reissued under equity incentive plans, net								112
Change in unrealized net capital gains and losses	445								445
Change in unrealized foreign currency translation adjustments	(16)								(16)
Change in unrecognized pension and other postretirement benefit cost	11								11
Balance, end of period at Mar. 31, 2014	22,105		1,505	9	3,017	36,041	(31)	(19,922)	1,486
Balance, beginning of period at Dec. 31, 2014			1,746		3,199	37,842	(23)	(21,030)	561
Increase (decrease) in equity
Preferred stock, par value (in dollars per share)	$ 1	0
Preferred stock issuance			0
Forward contract on accelerated share repurchase agreement					(75)
Equity incentive plans activity					(15)
Net income	677					677
Dividends on common stock						(127)
Dividends on preferred stock						(29)
Payments							0
Shares acquired								(915)
Shares reissued under equity incentive plans, net								146
Change in unrealized net capital gains and losses	211								211
Change in unrealized foreign currency translation adjustments	(27)								(27)
Change in unrecognized pension and other postretirement benefit cost	29								29
Balance, end of period at Mar. 31, 2015	$ 22,179		$ 1,746	$ 9	$ 3,109	$ 38,363	$ (23)	$ (21,799)	$ 774