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 income
Increase (decrease) in equity
Cumulative effect of change in accounting principle						$ 0			$ 0
Balance, beginning of period at Dec. 31, 2016			$ 1,746		$ 3,303	40,678		$ (24,741)	(416)
Increase (decrease) in equity
Preferred stock issuance			0
Forward contract on accelerated share repurchase agreement					0
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	$ 0	1,746	$ 9	3,285	41,208	$ (6)	(24,887)	(197)
Increase (decrease) in equity
Cumulative effect of change in accounting principle						1,088			(910)
Balance, beginning of period at Dec. 31, 2017	22,551		1,746		3,313	43,162		(25,982)	306
Increase (decrease) in equity
Preferred stock issuance			557
Forward contract on accelerated share repurchase agreement					45
Equity incentive plans activity					9
Net income	975					975
Dividends on common stock						(165)
Dividends on preferred stock						(29)
Shares acquired								(333)
Shares reissued under equity incentive plans, net								35
Change in unrealized net capital gains and losses	(565)								(565)
Change in unrealized foreign currency translation adjustments	(4)								(4)
Change in unrecognized pension and other postretirement benefit cost	23								23
Balance, end of period at Mar. 31, 2018	$ 23,277	$ 0	$ 2,303	$ 9	$ 3,367	$ 45,031	$ (3)	$ (26,280)	$ (1,150)