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v3.25.2

General - Summary of Reclassifications to Amounts Previously Reported (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Costs and expenses: |  |  |  |
Interest expense | $ 1,253 | $ 1,230 | $ 2,510 | $ 2,546
Insurance and Other [Member] |  |  |  |
Revenues: |  |  |  |
Sales and service revenues | 49,658 | 51,841 | 97,473 | 101,774
Interest, dividend and other investment income | 6,002 | 5,284 | 11,634 | 9,622
Costs and expenses: |  |  |  |
Cost of sales and services | 39,616 | 42,082 | 78,167 | 82,874
Selling, general and administrative expenses | 7,931 | 6,033 | 15,612 | 11,574
Interest expense | 318 | 336 | 658 | 742
Railroad, Utilities and Energy [Member] |  |  |  |
Revenues: |  |  |  |
Utility and energy operating revenues | 5,118 | 5,103 | 10,612 | 10,336
Service revenues and other income | 1,315 | 1,444 | 2,193 | 2,476
Costs and expenses: |  |  |  |
Utility and energy cost of sales and other expenses | 4,156 | 4,290 | 8,247 | 8,393
Interest expense | $ 935 | 894 | $ 1,852 | 1,804
Previously Reported [Member] | Insurance and Other [Member] |  |  |  |
Revenues: |  |  |  |
Sales and service revenues |  | 38,892 |  | 76,364
Interest, dividend and other investment income |  | 5,249 |  | 9,554
Costs and expenses: |  |  |  |
Cost of sales and services |  | 30,391 |  | 59,786
Selling, general and administrative expenses |  | 5,195 |  | 9,968
Interest expense |  | 330 |  | 646
Previously Reported [Member] | Railroad, Utilities and Energy [Member] |  |  |  |
Revenues: |  |  |  |
Utility and energy operating revenues |  | 18,048 |  | 35,738
Service revenues and other income |  | 1,483 |  | 2,552
Costs and expenses: |  |  |  |
Utility and energy cost of sales and other expenses |  | 16,819 |  | 33,087
Interest expense |  | 900 |  | 1,900
Reclassification [Member] | Insurance and Other [Member] |  |  |  |
Revenues: |  |  |  |
Sales and service revenues |  | 12,949 |  | 25,410
Interest, dividend and other investment income |  | 35 |  | 68
Costs and expenses: |  |  |  |
Cost of sales and services |  | 11,691 |  | 23,088
Selling, general and administrative expenses |  | 838 |  | 1,606
Interest expense |  | 6 |  | 96
Reclassification [Member] | Railroad, Utilities and Energy [Member] |  |  |  |
Revenues: |  |  |  |
Utility and energy operating revenues |  | (12,945) |  | (25,402)
Service revenues and other income |  | (39) |  | (76)
Costs and expenses: |  |  |  |
Utility and energy cost of sales and other expenses |  | (12,529) |  | (24,694)
Interest expense |  | $ (6) |  | $ (96)

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