Cash, Cash Equivalents and Investments (Tables)

12 Months Ended

Dec. 31, 2019

Cash and Cash Equivalents [Abstract]

Cash, Cash Equivalents and Investments

Our total cash, cash equivalents and investments are summarized below:

	December 31, 2019								December 31, 2018
(in millions)	Cash and cash equivalents		Available-for-sale marketable securities		Certificate of deposits		Total		Cash and cash equivalents		Available-for-sale marketable securities		Certificate of deposits		Total
Cash and cash equivalents	$	213	$	—	$	—	$	213	$	228	$	—	$	—	$	228
Investments	—		68		—		68		—		54		—		54
Restricted cash, cash equivalents and investments
Payroll funds collected	1,018		—		—		1,018		783		—		—		783
Collateral for health benefits claims	98		—		—		98		75		—		—		75
Collateral for workers' compensation claims	62		—		—		62		66		1		—		67
Collateral to secure standby letter of credit	—		—		—		—		—		—		2		2
Other security deposits	2		—		—		2		15		—		—		15
Total restricted cash, cash equivalents and investments	1,180		—		—		1,180		939		1		2		942
Investments, noncurrent	—		125		—		125		—		135		—		135
Restricted cash, cash equivalents and investments, noncurrent
Collateral for workers' compensation claims	63		148		1		212		182		5		—		187
Total	$	1,456	$	341	$	1	$	1,798	$	1,349	$	195	$	2	$	1,546