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Accumulated other comprehensive income
 3 Months Ended
Mar. 31, 2025
Equity [Abstract]  
Accumulated other comprehensive income

Note 20. 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

 

30

 

 

474

 

 

28

 

 

(38

)

 

6

 

 

500

 

Balance at March 31, 2025

$

147

 

$

(6,565

)

$

2,043

 

$

1,110

 

$

181

 

$

(3,084

)

 

 

 

 

 

 

 

 

 

 

 

 

2024

 

 

 

 

 

 

 

 

 

 

 

Balance at the beginning of the year

$

190

 

$

(5,393

)

$

1,353

 

$

(97

)

$

184

 

$

(3,763

)

Other comprehensive income

 

(29

)

 

(523

)

 

284

 

 

3

 

 

(22

)

 

(287

)

Balance at March 31, 2024

$

161

 

$

(5,916

)

$

1,637

 

$

(94

)

$

162

 

$

(4,050

)