Consolidated Balance Sheets € in Millions, £ in Millions, $ in Millions, ¥ in Billions		Dec. 31, 2020 USD ($)		Dec. 31, 2019 USD ($)
ASSETS
Investments in fixed maturity securities		$ 20,410		$ 18,685
Investments in equity securities		281,170	[1]	248,027	[2]
Loans and finance receivables		19,201		17,527
Inventories		19,208		19,852
Equipment held for lease		14,601		15,065
Goodwill	[3]	73,734		81,882
Deferred charges under retroactive reinsurance contracts		12,441		13,747
Total assets		873,729		817,729
LIABILITIES
Unpaid losses and loss adjustment expenses		79,854		73,019
Unpaid losses and loss adjustment expenses under retroactive reinsurance contracts		40,966		42,441
Income taxes, principally deferred		74,098		66,799
Total liabilities		422,393		389,166
Shareholders’ equity:
Common stock		8		8
Capital in excess of par value		35,626		35,658
Accumulated other comprehensive income		(4,243)		(5,243)
Retained earnings		444,626		402,493
Treasury stock, at cost		(32,853)		(8,125)
Berkshire Hathaway shareholders’ equity		443,164		424,791
Noncontrolling interests		8,172		3,772
Total shareholders’ equity		451,336		428,563
Total liabilities and shareholders' equity		873,729		817,729
Insurance and Other [Member]
ASSETS
Cash and cash equivalents	[4]	44,714		61,151
Short-term investments in U.S. Treasury Bills		90,300		63,822
Investments in fixed maturity securities		20,410		18,685
Investments in equity securities		281,170		248,027
Equity method investments		17,303		17,505
Loans and finance receivables		19,201		17,527
Other receivables		32,310		32,418
Inventories		19,208		19,852
Property, plant and equipment		21,200		21,438
Equipment held for lease		14,601		15,065
Goodwill		47,121		57,052
Other intangible assets		29,462		31,051
Deferred charges under retroactive reinsurance contracts		12,441		13,747
Other		14,580		13,232
Total assets		664,021		630,572
LIABILITIES
Unpaid losses and loss adjustment expenses		79,854		73,019
Unpaid losses and loss adjustment expenses under retroactive reinsurance contracts		40,966		42,441
Unearned premiums		21,395		19,782
Life, annuity and health insurance benefits		21,616		20,155
Other policyholder liabilities		8,670		7,723
Accounts payable, accruals and other liabilities		29,279		27,611
Derivative contract liabilities		1,065		968
Aircraft repurchase liabilities and unearned lease revenues		5,856		5,281
Notes payable and other borrowings		41,522		37,590
Total liabilities		250,223		234,570
Railroad, Utilities and Energy [Member]
ASSETS
Cash and cash equivalents	[4]	3,276		3,024
Receivables		3,542		3,417
Property, plant and equipment		151,216		137,838
Goodwill		26,613		24,830
Regulatory assets		3,440		2,881
Other		21,621		15,167
Total assets		209,708		187,157
LIABILITIES
Accounts payable, accruals and other liabilities		15,224		14,708
Regulatory liabilities		7,475		7,311
Notes payable and other borrowings		75,373		65,778
Total liabilities		$ 98,072		$ 87,797

[1] 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).

[2] Approximately 60% of the aggregate fair value was concentrated in four companies (American Express Company – $18.9 billion; Apple Inc. – $73.7 billion; Bank of America Corporation – $33.4 billion and The Coca-Cola Company – $22.1 billion).

[3] Net of accumulated goodwill impairments of $11.0 billion as of December 31, 2020 and $1.1 billion as of December 31, 2019.

[4] Includes U.S. Treasury Bills with maturities of three months or less when purchased of $23.2 billion at December 31, 2020 and $37.1 billion at December 31, 2019.