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


	Level 1		Level 2		Total
Cash equivalents:
Money market funds	$	706	$	—	$	706
Commercial paper	—		110		110
Corporate notes and bonds	—		28		28
Certificates of deposit	—		8		8
Deposits	235		—		235

Marketable securities:
Commercial paper	—		528		528
Corporate notes and bonds	—		2,412		2,412
Certificates of deposit	—		28		28
Mortgage and asset backed securities	—		98		98
U.S. government and agency securities	—		140		140

Total	$	941	$	3,352	$	4,293

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