Investments in equity securities (Tables)

12 Months Ended

Dec. 31, 2020

Investments Debt And Equity Securities [Abstract]

Schedule of investments in equity securities

Investments in equity securities as of December 31, 2020 and 2019 are summarized based on the primary industry of the investee in the table below (in millions).

	Cost Basis		Net Unrealized Gains		Fair Value
December 31, 2020 *
Banks, insurance and finance	$	26,312	$	40,167	$	66,479
Consumer products		34,747		111,583		146,330
Commercial, industrial and other		47,561		20,800		68,361
	$	108,620	$	172,550	$	281,170

* 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).

	Cost Basis		Net Unrealized Gains		Fair Value
December 31, 2019 *
Banks, insurance and finance	$	40,419	$	61,976	$	102,395
Consumer products		38,887		60,747		99,634
Commercial, industrial and other		31,034		14,964		45,998
	$	110,340	$	137,687	$	248,027

* 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).