Cash, Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2019

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Investments

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

	March 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	$	251	$	—	$	—	$	251	$	228	$	—	$	—	$	228
Investments	—		56		—		56		—		54		—		54
Restricted cash, cash equivalents and investments
Insurance carriers' security deposits	15		—		—		15		15		—		—		15
Payroll funds collected	564		—		—		564		783		—		—		783
Collateral for health benefits claims	75		—		—		75		75		—		—		75
Collateral for workers' compensation claims	65		1		—		66		66		1		—		67
Collateral to secure standby letter of credit	—		—		2		2		—		—		2		2
Total restricted cash, cash equivalents and investments	719		1		2		722		939		1		2		942
Investments, noncurrent	—		133		—		133		—		135		—		135
Restricted cash, cash equivalents and investments, noncurrent
Collateral for workers' compensation claims	179		5		—		184		182		5		—		187
Total	$	1,149	$	195	$	2	$	1,346	$	1,349	$	195	$	2	$	1,546