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Condensed Consolidated Statements of Shareholders’ Equity (unaudited) - USD ($) $ in Millions | Total | Preferred Stock | Preferred stock additional capital paid-in | Common stock par value | Common stock additional capital paid-in | Retained income | Deferred ESOP expense | Treasury stock | Accumulated other comprehensive income | Previously reported | Previously reported Retained income | Previously reported Accumulated other comprehensive income | Impact of change | Impact of change Retained income | Impact of change Accumulated other comprehensive income
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2017 |  |  | $ 1,746 |  | $ 3,313 | $ 41,579 |  | $ (25,982) | $ 1,889 |  | $ 43,162 | $ 306 |  |  |
Balance, beginning of period (Impact of change) at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (1,583) | $ 1,583
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock issuance |  |  | 557 |  |  |  |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | 45 |  |  |  |  |  |  |  |  |  |
Activity under equity incentive plans |  |  |  |  | 33 |  |  |  |  |  |  |  |  |  |
Net income | $ 1,723 |  |  |  |  | 1,723 |  |  |  | $ 1,651 | 1,651 |  |  |  |
Net income | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | $ 72 | 72 |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) |  |  |  |  |  | (325) |  |  |  |  | (325) |  |  |  |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Dividends on preferred stock |  |  |  |  |  | (68) |  |  |  |  | (68) |  |  |  |
Dividends on preferred stock | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Shares acquired |  |  |  |  |  |  |  | (892) |  |  |  |  |  |  |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 56 |  |  |  |  |  |  |
Change in unrealized net capital gains and losses | (698) |  |  |  |  |  |  |  | (698) | (698) |  | (698) |  |  |
Change in unrealized net capital gains and losses | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0
Change in unrealized foreign currency translation adjustments | (8) |  |  |  |  |  |  |  | (8) | (11) |  | (11) |  |  |
Change in unrealized foreign currency translation adjustments | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 3 |  | 3
Change in unamortized pension and other postretirement prior service credit | (30) |  |  |  |  |  |  |  | (30) | 45 |  | 45 |  |  |
Change in unamortized pension and other postretirement prior service credit | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (75) |  | (75)
Balance, end of period at Jun. 30, 2018 | $ 23,122 | $ 0 | 2,303 | $ 9 | 3,391 | 43,997 | $ (3) | (26,818) | 243 | 23,122 | 45,508 | (1,268) |  |  |
Balance, end of period (Impact of change) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  | 0 | (1,511) | 1,511
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends (in USD per share) | $ 0.92 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2018 |  |  | 2,303 |  | 3,367 | 43,479 |  | (26,280) | 398 |  | 45,031 | (1,150) |  |  |
Balance, beginning of period (Impact of change) at Mar. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,552) | 1,548
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock issuance |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | 0 |  |  |  |  |  |  |  |  |  |
Activity under equity incentive plans |  |  |  |  | 24 |  |  |  |  |  |  |  |  |  |
Net income | $ 717 |  |  |  |  | 717 |  |  |  | 676 | 676 |  |  |  |
Net income | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 41 | 41 |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) |  |  |  |  |  | (160) |  |  |  |  | (160) |  |  |  |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Dividends on preferred stock |  |  |  |  |  | (39) |  |  |  |  | (39) |  |  |  |
Dividends on preferred stock | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Shares acquired |  |  |  |  |  |  |  | (559) |  |  |  |  |  |  |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 21 |  |  |  |  |  |  |
Change in unrealized net capital gains and losses | (133) |  |  |  |  |  |  |  | (133) | (133) |  | (133) |  |  |
Change in unrealized net capital gains and losses | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0
Change in unrealized foreign currency translation adjustments | (6) |  |  |  |  |  |  |  | (6) | (7) |  | (7) |  |  |
Change in unrealized foreign currency translation adjustments | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 1 |  | 1
Change in unamortized pension and other postretirement prior service credit | (16) |  |  |  |  |  |  |  | (16) | 22 |  | 22 |  |  |
Change in unamortized pension and other postretirement prior service credit | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (38) |  | (38)
Balance, end of period at Jun. 30, 2018 | $ 23,122 | 0 | 2,303 | 9 | 3,391 | 43,997 | (3) | (26,818) | 243 | 23,122 | 45,508 | (1,268) |  |  |
Balance, end of period (Impact of change) at Jun. 30, 2018 |  |  |  |  |  |  |  |  |  |  |  |  | 0 | (1,511) | 1,511
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends (in USD per share) | $ 0.46 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2018 | $ 21,312 |  | 1,930 |  | 3,310 | 44,033 |  | (28,085) | 118 |  | 45,708 | (1,557) |  |  |
Balance, beginning of period (Impact of change) at Dec. 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,675) | 1,675
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock issuance |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | 150 |  |  |  |  |  |  |  |  |  |
Activity under equity incentive plans |  |  |  |  | 17 |  |  |  |  |  |  |  |  |  |
Net income | 2,143 |  |  |  |  | 2,143 |  |  |  | 2,207 | 2,207 |  |  |  |
Net income | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (64) | (64) |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) |  |  |  |  |  | (333) |  |  |  |  | (333) |  |  |  |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Dividends on preferred stock |  |  |  |  |  | (61) |  |  |  |  | (61) |  |  |  |
Dividends on preferred stock | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Shares acquired |  |  |  |  |  |  |  | (498) |  |  |  |  |  |  |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 83 |  |  |  |  |  |  |
Change in unrealized net capital gains and losses | 1,656 |  |  |  |  |  |  |  | 1,656 | 1,656 |  | 1,656 |  |  |
Change in unrealized net capital gains and losses | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0
Change in unrealized foreign currency translation adjustments | 9 |  |  |  |  |  |  |  | 9 | 14 |  | 14 |  |  |
Change in unrealized foreign currency translation adjustments | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (5) |  | (5)
Change in unamortized pension and other postretirement prior service credit | (23) |  |  |  |  |  |  |  | (23) | 135 |  | 135 |  |  |
Change in unamortized pension and other postretirement prior service credit | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (158) |  | (158)
Balance, end of period at Jun. 30, 2019 | $ 24,476 | 0 | 1,930 | 9 | 3,477 | 45,803 | (3) | (28,500) | 1,760 | 24,703 | 47,542 | 248 |  |  |
Balance, end of period (Impact of change) at Jun. 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  | (227) | (1,739) | 1,512
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends (in USD per share) | $ 1.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2019 |  |  | 1,930 |  | 3,291 | 45,148 |  | (28,042) | 1,085 |  | 46,818 | (566) |  |  |
Balance, beginning of period (Impact of change) at Mar. 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,670) | 1,651
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock issuance |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Forward contract on accelerated share repurchase agreement |  |  |  |  | 150 |  |  |  |  |  |  |  |  |  |
Activity under equity incentive plans |  |  |  |  | 36 |  |  |  |  |  |  |  |  |  |
Net income | $ 851 |  |  |  |  | 851 |  |  |  | 920 | 920 |  |  |  |
Net income | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (69) | (69) |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) |  |  |  |  |  | (166) |  |  |  |  | (166) |  |  |  |
Dividends on common stock (declared per share of $0.50, $0.46, $1.00 and $0.92) | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Dividends on preferred stock |  |  |  |  |  | (30) |  |  |  |  | (30) |  |  |  |
Dividends on preferred stock | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Shares acquired |  |  |  |  |  |  |  | (498) |  |  |  |  |  |  |
Shares reissued under equity incentive plans, net |  |  |  |  |  |  |  | 40 |  |  |  |  |  |  |
Change in unrealized net capital gains and losses | 682 |  |  |  |  |  |  |  | 682 | 682 |  | 682 |  |  |
Change in unrealized net capital gains and losses | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  | 0
Change in unrealized foreign currency translation adjustments | 4 |  |  |  |  |  |  |  | 4 | 7 |  | 7 |  |  |
Change in unrealized foreign currency translation adjustments | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (3) |  | (3)
Change in unamortized pension and other postretirement prior service credit | (11) |  |  |  |  |  |  |  | (11) | 125 |  | 125 |  |  |
Change in unamortized pension and other postretirement prior service credit | Impact of change |  |  |  |  |  |  |  |  |  |  |  |  | (136) |  | (136)
Balance, end of period at Jun. 30, 2019 | $ 24,476 | $ 0 | $ 1,930 | $ 9 | $ 3,477 | $ 45,803 | $ (3) | $ (28,500) | $ 1,760 | $ 24,703 | $ 47,542 | $ 248 |  |  |
Balance, end of period (Impact of change) at Jun. 30, 2019 |  |  |  |  |  |  |  |  |  |  |  |  | $ (227) | $ (1,739) | $ 1,512
Increase (decrease) in equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends (in USD per share) | $ 0.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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