CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Preferred Stock	Preferred stock additional capital paid-in	Common stock	Additional capital paid-in	Retained income	Deferred ESOP expense	Treasury stock	Accumulated other comprehensive (loss) income
Balance, beginning of period at Dec. 31, 2015					$ 3,245	$ 39,413		$ (23,620)	$ (755)
Increase (decrease) in equity
Equity incentive plans activity					(8)
Net income	$ 246					246
Dividends on common stock						(125)
Dividends on preferred stock						(29)
Shares acquired								(450)
Shares reissued under equity incentive plans, net								76
Change in unrealized net capital gains and losses	580								580
Change in unrealized foreign currency translation adjustments	14								14
Change in unrecognized pension and other postretirement benefit cost	11								11
Balance, end of period at Mar. 31, 2016	$ 20,340		$ 1,746	$ 9	3,237	39,505	$ (13)	(23,994)	(150)
Preferred stock, par value (in dollars per share)		$ 0
Preferred stock, par value (in dollars per share)	$ 1
Balance, beginning of period at Dec. 31, 2016					3,303	40,678		(24,741)	(416)
Increase (decrease) in equity
Equity incentive plans activity					(18)
Net income	$ 695					695
Dividends on common stock						(136)
Dividends on preferred stock						(29)
Shares acquired								(249)
Shares reissued under equity incentive plans, net								103
Change in unrealized net capital gains and losses	203								203
Change in unrealized foreign currency translation adjustments	(3)								(3)
Change in unrecognized pension and other postretirement benefit cost	19								19
Balance, end of period at Mar. 31, 2017	$ 21,158		$ 1,746	$ 9	$ 3,285	$ 41,208	$ (6)	$ (24,887)	$ (197)
Preferred stock, par value (in dollars per share)	$ 1	$ 0