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Accumulated other comprehensive income (Tables)
 3 Months Ended
Mar. 31, 2023
Equity [Abstract]  
Schedule of accumulated other comprehensive income

A summary of the net changes in after-tax accumulated other comprehensive income attributable to Berkshire Hathaway shareholders for the three months ending March 31, 2023 and 2022 follows (in millions).

 

 

 

Unrealized
gains (losses) on investments

 

 

Foreign currency translation

 

 

Long duration insurance contracts

 

 

Defined benefit pension plans

 

 

Other

 

 

Total

 

First quarter of 2023

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Beginning of year as previously reported

 

$

(187

)

 

$

(6,140

)

 

$

—

 

 

$

(552

)

 

$

288

 

 

$

(6,591

)

Adoption of ASU 2018-12

 

 

—

 

 

 

(2

)

 

 

1,541

 

 

 

—

 

 

 

—

 

 

 

1,539

 

Beginning balance as revised

 

 

(187

)

 

 

(6,142

)

 

 

1,541

 

 

 

(552

)

 

 

288

 

 

 

(5,052

)

Other comprehensive income

 

 

194

 

 

 

244

 

 

 

(291

)

 

 

44

 

 

 

(115

)

 

 

76

 

Balance at end of period

 

$

7

 

 

$

(5,898

)

 

$

1,250

 

 

$

(508

)

 

$

173

 

 

$

(4,976

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First quarter of 2022

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Beginning of year as previously reported

 

$

369

 

 

$

(4,092

)

 

$

—

 

 

$

(347

)

 

$

43

 

 

$

(4,027

)

Adoption of ASU 2018-12

 

 

—

 

 

 

—

 

 

 

(4,096

)

 

 

—

 

 

 

—

 

 

 

(4,096

)

Beginning balance as revised

 

 

369

 

 

 

(4,092

)

 

 

(4,096

)

 

 

(347

)

 

 

43

 

 

 

(8,123

)

Other comprehensive income

 

 

(186

)

 

 

(314

)

 

 

2,419

 

 

 

20

 

 

 

80

 

 

 

2,019

 

Balance at end of period

 

$

183

 

 

$

(4,406

)

 

$

(1,677

)

 

$

(327

)

 

$

123

 

 

$

(6,104

)