Investments of Insurance Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

A summary of our insurance subsidiaries’ investments at September 30, 2021 and December 31, 2020 follows (dollars in millions):

	September 30, 2021
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities	$	391	$	21	$	(1	)	$	411
Money market funds and other		119		—		—			119
	$	510	$	21	$	(1	)		530
Amounts classified as current assets									(112	)
Investment carrying value								$	418

	December 31, 2020
	Amortized Cost		Unrealized Amounts				Fair Value
			Gains		Losses
Debt securities	$	384	$	32	$	—	$	416
Money market funds and other		88		—		—		88
	$	472	$	32	$	—		504
Amounts classified as current assets								(116	)
Investment carrying value							$	388

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at September 30, 2021 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	—	$	—
Due after one year through five years		134		141
Due after five years through ten years		177		187
Due after ten years		80		83
	$	391	$	411