XML 60 R52.htm IDEA: XBRL DOCUMENT
v3.25.2

Accumulated other comprehensive income (Tables) | 6 Months Ended
--- | ---
Jun. 30, 2025
Equity [Abstract] |
Schedule of accumulated other comprehensive income | A summary of the net changes in after-tax accumulated other comprehensive income attributable to Berkshire shareholders follows (in millions).
| Unrealized investment gains (losses) |  | Foreign currency translation |  | Long-duration insurance contracts |  | Defined benefit pension plans |  | Other |  | Total |
2025 |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the year | $ | 117 |  | $ | (7,039 | ) | $ | 2,015 |  | $ | 1,148 |  | $ | 175 |  | $ | (3,584 | )
Other comprehensive income |  | 129 |  |  | 1,521 |  |  | 118 |  |  | (87 | ) |  | 8 |  |  | 1,689 |
Balance at June 30, 2025 | $ | 246 |  | $ | (5,518 | ) | $ | 2,133 |  | $ | 1,061 |  | $ | 183 |  | $ | (1,895 | )
2024 |  |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the year | $ | 190 |  | $ | (5,393 | ) | $ | 1,353 |  | $ | (97 | ) | $ | 184 |  | $ | (3,763 | )
Other comprehensive income |  | (22 | ) |  | (747 | ) |  | 684 |  |  | (1 | ) |  | (6 | ) |  | (92 | )
Balance at June 30, 2024 | $ | 168 |  | $ | (6,140 | ) | $ | 2,037 |  | $ | (98 | ) | $ | 178 |  | $ | (3,855 | )

X
- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration