| Share Repurchase Program [Table Text Block] |
Chubb Limited securities repurchase authorizations In June 2023, the Board authorized the repurchase of up to $5.0 billion of Chubb Common Shares, effective July 1, 2023, with no expiration date. In May 2025, the Board determined to terminate the June 2023 authorization as of June 30, 2025 and concurrently authorized a new repurchase amount of up to $5.0 billion of Chubb Common Shares, effective July 1, 2025, with no expiration date. In May 2026, the Board determined to terminate the June 2025 authorization as of June 30, 2026 and concurrently authorized a new repurchase amount of up to $7.5 billion of Chubb Common Shares, effective July 1, 2026, with no expiration date. The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | July 1, 2026 through July 27, 2026 | | June 30 | | June 30 | | | (in millions of U.S. dollars, except share data) | 2026 | | 2025 | | 2026 | | 2025 | | | Number of shares repurchased | 2,989,571 | | | 2,339,727 | | | 6,507,381 | | | 3,685,509 | | | 40,000 | | | Cost of shares repurchased | $ | 979 | | | $ | 676 | | | $ | 2,122 | | | $ | 1,061 | | | $ | 14 | | Repurchase authorization remaining at end of period (1) | $ | — | | | $ | — | | | $ | — | | | $ | — | | | $ | 7,486 | |
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| Schedule of Accumulated Other Comprehensive Income (Loss) |
The following table presents changes in accumulated other comprehensive income (loss): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | June 30 | | June 30 | | (in millions of U.S. dollars) | 2026 | | 2025 | | 2026 | | 2025 | | Accumulated other comprehensive income (loss) (AOCI) | | | | | | | | | Net unrealized appreciation (depreciation) on investments | | | | | | | | | Balance – beginning of period, net of tax | $ | (3,611) | | | $ | (3,704) | | | $ | (1,997) | | | $ | (4,552) | | | Change in period, before reclassification from AOCI (before tax) | 276 | | | 918 | | | (1,663) | | | 1,761 | | | Amounts reclassified from AOCI (before tax) | 81 | | | 68 | | | 194 | | | 126 | | | Change in period, before tax | 357 | | | 986 | | | (1,469) | | | 1,887 | | | Income tax (expense) benefit | (21) | | | (50) | | | 189 | | | (111) | | | Total other comprehensive income (loss) | 336 | | | 936 | | | (1,280) | | | 1,776 | | | Noncontrolling interests, net of tax | 7 | | | 4 | | | 5 | | | (4) | | | Balance – end of period, net of tax | (3,282) | | | (2,772) | | | (3,282) | | | (2,772) | | | Current discount rate on liability for future policy benefits | | | | | | | | | Balance – beginning of period, net of tax | (27) | | | (645) | | | (344) | | | (539) | | | Change in period, before tax | (145) | | | (130) | | | 241 | | | (252) | | | Income tax (expense) benefit | (8) | | | 9 | | | (69) | | | 21 | | | Total other comprehensive income (loss) | (153) | | | (121) | | | 172 | | | (231) | | | Noncontrolling interests, net of tax | (16) | | | (20) | | | (8) | | | (24) | | | Balance – end of period, net of tax | (164) | | | (746) | | | (164) | | | (746) | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended | | Six Months Ended | | June 30 | | June 30 | | (in millions of U.S. dollars) | 2026 | | 2025 | | 2026 | | 2025 | | Accumulated other comprehensive income (loss) (AOCI) - continued | | | | | | | | | Instrument-specific credit risk on market risk benefits | | | | | | | | | Balance – beginning of period, net of tax | (13) | | | (13) | | | (23) | | | (16) | | | Change in period, before tax | 1 | | | 1 | | | 13 | | | 5 | | | Income tax expense | — | | | — | | | (2) | | | (1) | | | Total other comprehensive income | 1 | | | 1 | | | 11 | | | 4 | | | Noncontrolling interests, net of tax | — | | | — | | | — | | | — | | | Balance – end of period, net of tax | (12) | | | (12) | | | (12) | | | (12) | | | Cumulative foreign currency translation adjustment | | | | | | | | | Balance – beginning of period, net of tax | (2,778) | | | (3,685) | | | (3,135) | | | (4,025) | | | Change in period, before reclassification from AOCI (before tax) | (147) | | | 803 | | | 390 | | | 1,170 | | | Amounts reclassified from AOCI (before tax) | (11) | | | (7) | | | (20) | | | (15) | | | Change in period, before tax | (158) | | | 796 | | | 370 | | | 1,155 | | | Income tax (expense) benefit | 10 | | | 3 | | | 4 | | | (9) | | | Total other comprehensive income (expense) | (148) | | | 799 | | | 374 | | | 1,146 | | | Noncontrolling interests, net of tax | 89 | | | 33 | | | 254 | | | 40 | | | Balance – end of period, net of tax | (3,015) | | | (2,919) | | | (3,015) | | | (2,919) | | | Fair value hedging instruments | | | | | | | | | Balance – beginning of period, net of tax | (61) | | | (22) | | | (58) | | | 50 | | | Change in period, before reclassification from AOCI (before tax) | 16 | | | 141 | | | (27) | | | 115 | | | Amounts reclassified from AOCI (before tax) | 27 | | | (164) | | | 66 | | | (229) | | | Change in period, before tax | 43 | | | (23) | | | 39 | | | (114) | | | Income tax (expense) benefit | (9) | | | 5 | | | (8) | | | 24 | | | Total other comprehensive income (loss) | 34 | | | (18) | | | 31 | | | (90) | | | Noncontrolling interests, net of tax | — | | | — | | | — | | | — | | | Balance – end of period, net of tax | (27) | | | (40) | | | (27) | | | (40) | | | Postretirement benefit liability adjustment | | | | | | | | | Balance – beginning of period, net of tax | 579 | | | 434 | | | 582 | | | 438 | | | Change in period, before tax | (4) | | | (3) | | | (6) | | | (7) | | | Income tax benefit | 2 | | | — | | | 1 | | | — | | | Total other comprehensive loss | (2) | | | (3) | | | (5) | | | (7) | | | Noncontrolling interests, net of tax | — | | | — | | | — | | | — | | | Balance – end of period, net of tax | 577 | | | 431 | | | 577 | | | 431 | | | Accumulated other comprehensive loss | $ | (5,923) | | | $ | (6,058) | | | $ | (5,923) | | | $ | (6,058) | | | | | | | | | |
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