Consolidated Balance Sheets £ in Millions, $ in Millions, € in Billions, ¥ in Billions		Jun. 30, 2021 USD ($)		Dec. 31, 2020 USD ($)
ASSETS
Investments in fixed maturity securities		$ 20,460		$ 20,410
Investments in equity securities		307,942	[1]	281,170	[2]
Loans and finance receivables		19,900		19,201
Inventories		19,393		19,208
Equipment held for lease		14,659		14,601
Goodwill	[3]	73,758		73,734
Deferred charges under retroactive reinsurance contracts		11,968		12,441
Total assets		912,493		873,729
LIABILITIES
Unpaid losses and loss adjustment expenses		82,958		79,854
Unpaid losses and loss adjustment expenses under retroactive reinsurance contracts		40,237		40,966
Income taxes, principally deferred		81,577		74,098
Total liabilities		433,693		422,393
Shareholders’ equity:
Common stock		8		8
Capital in excess of par value		35,635		35,626
Accumulated other comprehensive income		(4,219)		(4,243)
Retained earnings		484,431		444,626
Treasury stock, at cost		(45,446)		(32,853)
Berkshire Hathaway shareholders’ equity		470,409		443,164
Noncontrolling interests		8,391		8,172
Total shareholders’ equity		478,800		451,336
Total liabilities and shareholders' equity		912,493		873,729
Insurance and Other [Member]
ASSETS
Cash and cash equivalents	[4]	38,924		44,714
Short-term investments in U.S. Treasury Bills		101,760		90,300
Investments in fixed maturity securities		20,460		20,410
Investments in equity securities		307,942		281,170
Equity method investments		16,542		17,303
Loans and finance receivables		19,900		19,201
Other receivables		36,044		32,310
Inventories		19,393		19,208
Property, plant and equipment		20,865		21,200
Equipment held for lease		14,659		14,601
Goodwill		47,080		47,121
Other intangible assets		28,853		29,462
Deferred charges under retroactive reinsurance contracts		11,968		12,441
Other		15,638		14,580
Total assets		700,028		664,021
LIABILITIES
Unpaid losses and loss adjustment expenses		82,958		79,854
Unpaid losses and loss adjustment expenses under retroactive reinsurance contracts		40,237		40,966
Unearned premiums		23,732		21,395
Life, annuity and health insurance benefits		22,106		21,616
Other policyholder liabilities		8,528		8,670
Accounts payable, accruals and other liabilities		29,816		29,279
Derivative contract liabilities		355		1,065
Aircraft repurchase liabilities and unearned lease revenues		5,819		5,856
Notes payable and other borrowings		40,561		41,522
Total liabilities		254,112		250,223
Railroad, Utilities and Energy [Member]
ASSETS
Cash and cash equivalents	[4]	3,374		3,276
Receivables		4,229		3,542
Property, plant and equipment		152,787		151,216
Goodwill		26,678		26,613
Regulatory assets		3,610		3,440
Other		21,787		21,621
Total assets		212,465		209,708
LIABILITIES
Accounts payable, accruals and other liabilities		15,728		15,224
Regulatory liabilities		7,614		7,475
Notes payable and other borrowings		74,662		75,373
Total liabilities		$ 98,004		$ 98,072

[1] Approximately 69% of the aggregate fair value was concentrated in four companies (American Express Company – $25.1 billion; Apple Inc. – $124.3 billion; Bank of America Corporation – $42.6 billion and The Coca-Cola Company – $21.6 billion).

[2] Approximately 68% of the aggregate fair value was concentrated in four companies (American Express Company – $18.3 billion; Apple Inc. – $120.4 billion; Bank of America Corporation – $31.3 billion and The Coca-Cola Company – $21.9 billion).

[3] Net of accumulated goodwill impairments of $11.0 billion as of June 30, 2021 and December 31, 2020.

[4] Includes U.S. Treasury Bills with maturities of three months or less when purchased of $16.6 billion at June 30, 2021 and $23.2 billion at December 31, 2020.