Significant business acquisitions (Tables)

12 Months Ended

Dec. 31, 2022

Business Combinations [Abstract]

Summary of preliminary values of identified assets acquired and liabilities assumed

The preliminary values of the Alleghany identified assets acquired and liabilities assumed are summarized as follows (in millions). Valuations of certain assets, such as intangible assets and goodwill, and certain liabilities as of the acquisition date have not been finalized at this time and are provisional.

Cash, cash equivalents and U.S. Treasury Bills	$	3,762
Investments in fixed maturity and equity securities		15,982
Loans and other receivables		5,650
Goodwill and other intangible assets		6,362
Other		3,834
Assets acquired	$	35,590
Unpaid losses and loss adjustment expenses	$	15,080
Unearned premiums		3,536
Notes payable		2,169
Other		3,300
Liabilities assumed		24,085
Net assets	$	11,505

Summary of unaudited pro forma consolidated earnings

The following table sets forth certain unaudited pro forma consolidated earnings data for the years ending December 31, 2022 and 2021, as if the Alleghany acquisition was consummated on the same terms at the beginning of 2021 (in millions, except per share amounts).

	2022			2021
Revenues	$	311,184		$	287,450
Net earnings (loss) attributable to Berkshire Hathaway shareholders		(24,107	)		90,728
Net earnings (loss) per equivalent Class A common share		(16,412	)		60,077