Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2022

Equity [Abstract]

Stock-Based Compensation Expense

Stock-based compensation expense is as follows (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2022		2021		2022
Cost of sales	$	145	$	213	$	235	$	359
Fulfillment	566		763		908		1,261
Technology and content	1,887		2,814		3,115		4,459
Sales and marketing	691		990		1,147		1,655
General and administrative	302		429		492		725
Total stock-based compensation expense	$	3,591	$	5,209	$	5,897	$	8,459

Restricted Stock Unit Activity

The following table summarizes our restricted stock unit activity for the six months ended June 30, 2022 (in millions):

	Number of Units	Weighted-Average Grant-Date Fair Value
Outstanding as of December 31, 2021	279.9	$	134
Units granted	166.0	159
Units vested	(54.2)	108
Units forfeited	(24.2)	140
Outstanding as of June 30, 2022	367.5	149

Scheduled Vesting for Outstanding Restricted Stock Units

Scheduled vesting for outstanding restricted stock units as of June 30, 2022, is as follows (in millions):

	Six Months Ended December 31,	Year Ended December 31,
	2022	2023	2024	2025	2026	Thereafter	Total
Scheduled vesting — restricted stock units	57.7	134.5	123.3	38.0	9.8	4.2	367.5

Changes in Stockholders' Equity

The following table shows changes in stockholders’ equity (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2022		2021		2022
Total beginning stockholders’ equity	$	103,320	$	134,001	$	93,404	$	138,245
Beginning common stock	106		107		105		106
Stock-based compensation and issuance of employee benefit plan stock	0		0		1		1
Ending common stock	106		107		106		107
Beginning treasury stock	(1,837)		(4,503)		(1,837)		(1,837)
Common stock repurchased	—		(3,334)		—		(6,000)
Ending treasury stock	(1,837)		(7,837)		(1,837)		(7,837)
Beginning additional paid-in capital	45,060		58,691		42,765		55,437
Stock-based compensation and issuance of employee benefit plan stock	3,563		5,180		5,858		8,434
Ending additional paid-in capital	48,623		63,871		48,623		63,871
Beginning accumulated other comprehensive income (loss)	(666)		(2,365)		(180)		(1,376)
Other comprehensive income (loss)	141		(2,417)		(345)		(3,406)
Ending accumulated other comprehensive income (loss)	(525)		(4,782)		(525)		(4,782)
Beginning retained earnings	60,658		82,071		52,551		85,915
Net income (loss)	7,778		(2,028)		15,885		(5,872)
Ending retained earnings	68,436		80,043		68,436		80,043
Total ending stockholders’ equity	$	114,803	$	131,402	$	114,803	$	131,402