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Cash, Cash Equivalents and Investments - Unrestricted and Restricted - (Tables)

6 Months Ended

Jun. 30, 2021

Cash and Cash Equivalents [Abstract]

Summary of Cash, Cash Equivalents and Investments

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

			June 30, 2021												December 31, 2020
(in millions)			Cash and cash equivalents			Available-for-sale marketable securities						Total						Cash and cash equivalents			Available-for-sale marketable securities						Total
Cash and cash equivalents			$	464		$	—					$	464					$	301		$	—					$	301
Investments			—			131						131						—			57						57
Restricted cash, cash equivalents and investments:
Payroll funds collected			783			—						783						1,228			—						1,228
Collateral for health benefits claims			23			89						112						16			82						98
Collateral for workers' compensation claims			61			—						61						60			—						60
Other security deposits			2			—						2						2			—						2
Total restricted cash, cash equivalents and investments			869			89						958						1,306			82						1,388
Investments, noncurrent			—			194						194						—			138						138
Restricted cash, cash equivalents and investments, noncurrent
Collateral for workers' compensation claims			28			151						179						36			174						210
Total			$	1,361		$	565					$	1,926					$	1,643		$	451					$	2,094

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Tabular disclosure of the components of cash, cash equivalents, and investments.

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