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Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2022 |  | $ 20,140 | $ 135 | $ 2,641 | $ 44,367 | $ (6,429) | $ (20,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 1,188 | 0 | 0 | 1,188 | 0 | 0
Unrealized foreign currency translation gains (losses) during period, net of income taxes |  | (54) | 0 | 0 | 0 | (54) | 0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments |  | 1,991 | 0 | 0 | 0 | 1,991 | 0
Unrealized gains (losses) on derivatives during period, net of income taxes |  | 1 | 0 | 0 | 0 | 1 | 0
Effect of changes in discount rate assumptions during period, net of income taxes |  | (2,794) | 0 | 0 | 0 | (2,794) | 0
Pension liability adjustment during period, net of income taxes |  | 7 | 0 | 0 | 0 | 7 | 0
Dividends to shareholders | [1] | 0 | 0 | 0 | 0 | 0 | 0
Exercise of stock options |  | 3 | 0 | 3 | 0 | 0 | 0
Share-based compensation |  | 14 | 0 | 14 | 0 | 0 | 0
Purchases of treasury stock |  | (732) | 0 | 0 | 0 | 0 | (732)
Treasury stock reissued |  | 20 | 0 | 7 | 0 | 0 | 13
Balance, end of period at Mar. 31, 2023 |  | 19,784 | 135 | 2,665 | 45,555 | (7,278) | (21,293)
Balance, beginning of period at Dec. 31, 2022 |  | 20,140 | 135 | 2,641 | 44,367 | (6,429) | (20,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 2,822 |  |  |  |  |
Effect of changes in discount rate assumptions during period, net of income taxes |  |  |  |  |  | (3,000) |
Balance, end of period at Jun. 30, 2023 |  | 20,439 | 136 | 2,697 | 46,937 | (7,338) | (21,993)
Balance, beginning of period at Dec. 31, 2022 |  | 20,140 | 135 | 2,641 | 44,367 | (6,429) | (20,574)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Effect of changes in discount rate assumptions during period, net of income taxes |  |  |  |  |  | (460) |
Balance, end of period at Dec. 31, 2023 |  | 21,985 | 136 | 2,771 | 47,993 | (5,520) | (23,395)
Balance, beginning of period at Mar. 31, 2023 |  | 19,784 | 135 | 2,665 | 45,555 | (7,278) | (21,293)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 1,634 | 0 | 0 | 1,634 | 0 | 0
Unrealized foreign currency translation gains (losses) during period, net of income taxes |  | (631) | 0 | 0 | 0 | (631) | 0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments |  | 689 | 0 | 0 | 0 | 689 | 0
Unrealized gains (losses) on derivatives during period, net of income taxes |  | 1 | 0 | 0 | 0 | 1 | 0
Effect of changes in discount rate assumptions during period, net of income taxes |  | (165) | 0 | 0 | 0 | (165) | 0
Pension liability adjustment during period, net of income taxes |  | 46 | 0 | 0 | 0 | 46 | 0
Dividends to shareholders | [1] | (252) | 0 | 0 | (252) | 0 | 0
Exercise of stock options |  | 5 | 0 | 5 | 0 | 0 | 0
Share-based compensation |  | 18 | 1 | 17 | 0 | 0 | 0
Purchases of treasury stock |  | (708) | 0 | 0 | 0 | 0 | (708)
Treasury stock reissued |  | 18 | 0 | 10 | 0 | 0 | 8
Balance, end of period at Jun. 30, 2023 |  | 20,439 | 136 | 2,697 | 46,937 | (7,338) | (21,993)
Balance, beginning of period at Dec. 31, 2023 |  | 21,985 | 136 | 2,771 | 47,993 | (5,520) | (23,395)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 1,879 | 0 | 0 | 1,879 | 0 | 0
Unrealized foreign currency translation gains (losses) during period, net of income taxes |  | (597) | 0 | 0 | 0 | (597) | 0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments |  | (47) | 0 | 0 | 0 | (47) | 0
Unrealized gains (losses) on derivatives during period, net of income taxes |  | (4) | 0 | 0 | 0 | (4) | 0
Effect of changes in discount rate assumptions during period, net of income taxes |  | 1,065 | 0 | 0 | 0 | 1,065 | 0
Pension liability adjustment during period, net of income taxes |  | 1 | 0 | 0 | 0 | 1 | 0
Dividends to shareholders | [1] | 0 | 0 | 0 | 0 | 0 | 0
Exercise of stock options |  | 4 | 0 | 4 | 0 | 0 | 0
Share-based compensation |  | 18 | 0 | 18 | 0 | 0 | 0
Purchases of treasury stock |  | (793) | 0 | 0 | 0 | 0 | (793)
Treasury stock reissued |  | 26 | 0 | 13 | 0 | 0 | 13
Balance, end of period at Mar. 31, 2024 |  | 23,537 | 136 | 2,806 | 49,872 | (5,102) | (24,175)
Balance, beginning of period at Dec. 31, 2023 |  | 21,985 | 136 | 2,771 | 47,993 | (5,520) | (23,395)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 3,634 |  |  |  |  |
Effect of changes in discount rate assumptions during period, net of income taxes |  |  |  |  |  | 4,000 |
Balance, end of period at Jun. 30, 2024 |  | 26,047 | 136 | 2,835 | 51,345 | (3,292) | (24,977)
Balance, beginning of period at Mar. 31, 2024 |  | 23,537 | 136 | 2,806 | 49,872 | (5,102) | (24,175)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net earnings |  | 1,755 | 0 | 0 | 1,755 | 0 | 0
Unrealized foreign currency translation gains (losses) during period, net of income taxes |  | (425) | 0 | 0 | 0 | (425) | 0
Unrealized gains (losses) on fixed maturity securities during period, net of income taxes and reclassification adjustments |  | (691) | 0 | 0 | 0 | (691) | 0
Unrealized gains (losses) on derivatives during period, net of income taxes |  | 4 | 0 | 0 | 0 | 4 | 0
Effect of changes in discount rate assumptions during period, net of income taxes |  | 2,920 | 0 | 0 | 0 | 2,920 | 0
Pension liability adjustment during period, net of income taxes |  | 2 | 0 | 0 | 0 | 2 | 0
Dividends to shareholders | [1] | (282) | 0 | 0 | (282) | 0 | 0
Exercise of stock options |  | 2 | 0 | 2 | 0 | 0 | 0
Share-based compensation |  | 12 | 0 | 12 | 0 | 0 | 0
Purchases of treasury stock |  | (810) | 0 | 0 | 0 | 0 | (810)
Treasury stock reissued |  | 23 | 0 | 15 | 0 | 0 | 8
Balance, end of period at Jun. 30, 2024 |  | $ 26,047 | $ 136 | $ 2,835 | $ 51,345 | $ (3,292) | $ (24,977)
[1] | Dividends to shareholders are recorded in the period in which they are declared.

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