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Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions | Total | Prior to Adoption | Effect of Adoption | Common Stock | Additional Paid-in Capital | Retained Earnings | Retained Earnings Prior to Adoption | Retained Earnings Effect of Adoption | Accumulated Other Comprehensive (Loss) Income | Accumulated Other Comprehensive (Loss) Income Prior to Adoption | Accumulated Other Comprehensive (Loss) Income Effect of Adoption | Treasury Stock
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Total stockholder's equity at beginning of period at Dec. 31, 2021 | [1] |  |  |  |  | $ 683 | $ 2,215 | $ 9,639 |  | $ 9,663 | $ (24) | $ (1,360) |  | $ 320 | $ (1,680) | $ (72) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | [1] |  |  |  |  |  | (12) |  |  |  |  |  |  |  |  | 17 |
Dividends to common stockholders ($0.42, $0.40, $2.04, $2.80 per share) | [1] |  |  |  |  |  |  | (766) |  |  |  |  |  |  |  |  |
Net income |  | $ 485 | [2] | $ 518 | $ (33) |  |  | 485 | [1] |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (1,803) |  | (3,033) | 1,230 |  |  |  |  |  |  | (1,803) | [1] |  |  |  |
Purchase of treasury stock |  | (21) |  |  |  |  |  |  |  |  |  |  |  |  |  | (21) | [1]
Total stockholder's equity at end of period at Jun. 30, 2022 | [1] | $ 9,005 |  |  |  | 683 | 2,203 | 9,358 |  |  |  | (3,163) |  |  |  | (76) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per share (usd per share) |  | $ 2.80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total stockholder's equity at beginning of period at Mar. 31, 2022 | [1] |  |  |  |  | 683 | 2,195 | 9,277 |  | 9,319 | (42) | (2,380) |  | (1,303) | (1,077) | (77) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | [1] |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  | 1 |
Dividends to common stockholders ($0.42, $0.40, $2.04, $2.80 per share) | [1] |  |  |  |  |  |  | (109) |  |  |  |  |  |  |  |  |
Net income |  | $ 190 | [3],[4] | 205 | (15) |  |  | 190 | [1] |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (783) | [4] | (1,410) | 627 |  |  |  |  |  |  | (783) | [1] |  |  |  |
Purchase of treasury stock | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Total stockholder's equity at end of period at Jun. 30, 2022 | [1] | $ 9,005 |  |  |  | 683 | 2,203 | 9,358 |  |  |  | (3,163) |  |  |  | (76) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per share (usd per share) |  | $ 0.40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total stockholder's equity at beginning of period at Dec. 31, 2022 |  | $ 8,548 | [5] | $ 8,825 | $ (277) | 683 | 2,220 | 9,336 |  | 9,572 | (236) | (3,598) |  | (3,557) | (41) | (93) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  | (16) |  |  |  |  |  |  |  |  | 22 |
Dividends to common stockholders ($0.42, $0.40, $2.04, $2.80 per share) |  |  |  |  |  |  |  | (557) |  |  |  |  |  |  |  |  |
Net income |  | 580 |  |  |  |  |  | 580 |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | 173 |  |  |  |  |  |  |  |  |  | 173 |  |  |  |  |
Purchase of treasury stock |  | (24) |  |  |  |  |  |  |  |  |  |  |  |  |  | (24) |
Total stockholder's equity at end of period at Jun. 30, 2023 |  | $ 8,726 |  |  |  | 683 | 2,204 | 9,359 |  |  |  | (3,425) |  |  |  | (95) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per share (usd per share) |  | $ 2.04 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total stockholder's equity at beginning of period at Mar. 31, 2023 |  |  |  |  |  | 683 | 2,196 | 9,191 |  | $ 9,191 | $ 0 | (3,308) |  | $ (3,308) | $ 0 | (95) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  |  |  | 8 |  |  |  |  |  |  |  |  | 0 |
Dividends to common stockholders ($0.42, $0.40, $2.04, $2.80 per share) |  |  |  |  |  |  |  | (115) |  |  |  |  |  |  |  |  |
Net income |  | $ 283 |  |  |  |  |  | 283 |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (117) |  |  |  |  |  |  |  |  |  | (117) |  |  |  |  |
Purchase of treasury stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Total stockholder's equity at end of period at Jun. 30, 2023 |  | $ 8,726 |  |  |  | $ 683 | $ 2,204 | $ 9,359 |  |  |  | $ (3,425) |  |  |  | $ (95) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared per share (usd per share) |  | $ 0.42 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.
[2] | As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.
[3] | As of January 1, 2023, the Company adopted ASU 2018-12, Financial Services-Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12) using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.
[4] | As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.
[5] | As of January 1, 2023, the Company adopted ASU 2018-12 using the modified retrospective method applied as of the transition date of January 1, 2021. Prior period amounts in the financial statements have been adjusted to reflect application of the new guidance. See Note A to the Condensed Consolidated Financial Statements for additional information.

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