Significant business acquisitions and other transactions (Tables)

12 Months Ended

Dec. 31, 2024

Business Acquisition [Line Items]

Summary of unaudited pro forma consolidated earnings

Certain unaudited pro forma revenue and consolidated earnings (loss) data for the year ended December 31, 2022 as if the Alleghany and Pilot acquisitions were completed on the same terms at the beginning of 2022 follows (in millions, except per share amounts).

	2022
Revenues	$	383,115
Net earnings (loss) attributable to Berkshire shareholders		(23,947	)
Net earnings (loss) per equivalent Class A common share		(16,303	)

Pilot [Member]

Business Acquisition [Line Items]

Summary of preliminary values of identified assets acquired and liabilities assumed

A summary of the values of Pilot’s assets acquired, liabilities assumed and noncontrolling interests as of January 31, 2023 follows (in millions).

Assets acquired			Liabilities assumed and noncontrolling interests
Property, plant and equipment	$	8,015	Notes payable	$	5,876
Goodwill*		6,605	Other liabilities		4,918
Other intangible assets		6,853	Liabilities assumed		10,794
Other assets		7,047	Noncontrolling interests, predominantly redeemable		3,361
			Liabilities assumed and noncontrolling interests	$	14,155
Assets acquired	$	28,520	Net assets	$	14,365

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* Goodwill from this acquisition is expected to be deductible for income tax purposes.