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Accumulated other comprehensive income (Tables)
 9 Months Ended
Sep. 30, 2022
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 nine months ending September 30, 2022 and 2021 follows (in millions).

 

 

 

Unrealized
appreciation of
fixed maturity
securities, net

 

 

Foreign
currency
translation

 

 

Defined benefit
pension plans

 

 

Other

 

 

Accumulated
other
comprehensive
income

 

First nine months of 2022

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

 

$

369

 

 

$

(4,092

)

 

$

(347

)

 

$

43

 

 

$

(4,027

)

Other comprehensive income, net

 

 

(767

)

 

 

(3,676

)

 

 

47

 

 

 

189

 

 

 

(4,207

)

Balance at end of period

 

$

(398

)

 

$

(7,768

)

 

$

(300

)

 

$

232

 

 

$

(8,234

)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

First nine months of 2021

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance at beginning of year

 

$

536

 

 

$

(3,082

)

 

$

(1,645

)

 

$

(52

)

 

$

(4,243

)

Other comprehensive income, net

 

 

(126

)

 

 

(619

)

 

 

112

 

 

 

42

 

 

 

(591

)

Balance at end of period

 

$

410

 

 

$

(3,701

)

 

$

(1,533

)

 

$

(10

)

 

$

(4,834

)