Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 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 June 30, 2021 (in millions): 

	Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	561	$	—	$	561
Commercial paper	—		48		48
Deposits	140		—		140
U.S. government and agency securities	—		53		53
Marketable securities:
Commercial paper	—		430		430
Corporate notes and bonds	—		2,328		2,328
Certificates of deposit	—		61		61
U.S. government and agency securities	—		107		107
Mortgage and asset backed securities	—		46		46
Total	$	701	$	3,073	$	3,774

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