Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2021

Cash and Cash Equivalents [Abstract]

Components of cash and cash equivalents

The following table summarizes the components of our cash and cash equivalents (amounts in millions):

	At December 31,
	2021		2020
Cash	$	354	$	268
Foreign government treasury bills	34		34
Money market funds	10,035		8,345
Cash and cash equivalents	$	10,423	$	8,647