Equity (Tables)

12 Months Ended

Dec. 31, 2019

Equity [Abstract]

Schedule of common stock outstanding

Shares of Common Stock Outstanding
(in millions)	Class A		Class B
Balance, December 31, 2016	4,742		9
Stock compensation plans	19		—
Repurchases and retirements of common stock	(131	)	—
Employee stock purchase plans	5		—
Balance, December 31, 2017	4,635		9
Stock compensation plans	15		—
Repurchases and retirements of common stock	(140	)	—
Employee stock purchase plans	7		—
Balance, December 31, 2018	4,517		9
Stock compensation plans	21		—
Repurchases and retirements of common stock	—		—
Employee stock purchase plans	6		—
Balance, December 31, 2019	4,544		9

Schedule of shares repurchased

Share Repurchases Under Share Repurchase Program Authorization
Year ended December 31 (in millions)	2019		2018		2017
Cash consideration	$	—	$	5,000	$	5,000
Shares repurchased	—		140		131

Schedule of accumulated other comprehensive income (loss)

Accumulated Other Comprehensive Income (Loss)
December 31 (in millions)	2019		2018
Unrealized gains (losses) on marketable securities	$	6	$	3
Deferred gains (losses) on cash flow hedges	139		55
Unrecognized gains (losses) on employee benefit obligations	265		325
Cumulative translation adjustments	637		(751		)
Accumulated other comprehensive income (loss), net of deferred taxes	$	1,047	$	(368	)