Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Assets Measured at Fair Value on Recurring Basis

The following table presents our fair value hierarchy for our assets measured at fair value on a recurring basis as of March 31, 2021 (in millions): 

	Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	1,059	$	—	$	1,059
Commercial paper	—		34		34
Corporate notes and bonds	—		3		3
Deposits	100		—		100
U.S. government and agency securities	—		69		69
Marketable securities:
Commercial paper	—		458		458
Corporate notes and bonds	—		2,324		2,324
Certificates of deposit	—		74		74
U.S. government and agency securities	—		97		97
Mortgage and asset backed securities	—		30		30
Total	$	1,159	$	3,089	$	4,248

The following table presents our fair value hierarchy for our assets measured at fair value on a recurring basis as of December 31, 2020 (in millions): 

	Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	1,305	$	—	$	1,305
U.S. government and agency securities	—		2		2
Marketable securities:
Commercial paper	—		406		406
Corporate notes and bonds	—		2,308		2,308
Certificates of deposit	—		23		23
U.S. government and agency securities	—		146		146
Total	$	1,305	$	2,885	$	4,190