Investments of Insurance Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

A summary of our insurance subsidiaries’ investments at September 30, 2020 and December 31, 2019 follows (dollars in millions):

	September 30, 2020
	Amortized Cost		Unrealized Amounts				Fair Value
			Gains		Losses
Debt securities	$	384	$	31	$	—	$	415
Money market funds and other		71		—		—		71
	$	455	$	31	$	—		486
Amounts classified as current assets								(96	)
Investment carrying value							$	390

	December 31, 2019
	Amortized Cost		Unrealized Amounts				Fair Value
			Gains		Losses
Debt securities	$	359	$	18	$	—	$	377
Money market funds and other		85		—		—		85
	$	444	$	18	$	—		462
Amounts classified as current assets								(147	)
Investment carrying value							$	315

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at September 30, 2020 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	4	$	4
Due after one year through five years		127		135
Due after five years through ten years		175		192
Due after ten years		78		84
	$	384	$	415