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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 |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | (37) |  |  |  |
Equity incentive plans activity |  |  |  |  | 29 |  |  |  |
Net income | $ 1,037 |  |  |  |  | 1,037 |  |  |
Dividends on common stock |  |  |  |  |  | (373) |  |  |
Dividends on preferred stock |  |  |  |  |  | (87) |  |  |
Shares acquired |  |  |  |  |  |  |  | (1,094) |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 177 |
Change in unrealized net capital gains and losses | 1,197 |  |  |  |  |  |  |  | 1,197
Change in unrealized foreign currency translation adjustments | 12 |  |  |  |  |  |  |  | 12
Change in unrecognized pension and other postretirement benefit cost | 48 |  |  |  |  |  |  |  | 48
Balance, end of period at Sep. 30, 2016 | $ 20,934 |  | $ 1,746 | $ 9 | 3,237 | 39,990 | $ (13) | (24,537) | 502
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 |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | 0 |  |  |  |
Equity incentive plans activity |  |  |  |  | 27 |  |  |  |
Net income | $ 1,940 |  |  |  |  | 1,940 |  |  |
Dividends on common stock |  |  |  |  |  | (406) |  |  |
Dividends on preferred stock |  |  |  |  |  | (87) |  |  |
Shares acquired |  |  |  |  |  |  |  | (845) |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 173 |
Change in unrealized net capital gains and losses | 598 |  |  |  |  |  |  |  | 598
Change in unrealized foreign currency translation adjustments | 36 |  |  |  |  |  |  |  | 36
Change in unrecognized pension and other postretirement benefit cost | 110 |  |  |  |  |  |  |  | 110
Balance, end of period at Sep. 30, 2017 | $ 22,119 |  | $ 1,746 | $ 9 | $ 3,330 | $ 42,125 | $ (6) | $ (25,413) | $ 328
Preferred stock, par value (in dollars per share) | $ 1 | $ 0 |  |  |  |  |  |  |

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