Investments of Insurance Subsidiaries (Tables)

6 Months Ended

Jun. 30, 2017

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

A summary of our insurance subsidiaries’ investments at June 30, 2017 and December 31, 2016 follows (dollars in millions):

	June 30, 2017
	Amortized Cost		Unrealized Amounts				Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	364		$14		$—	$	378
Money market funds		20		—		—		20
		384		14		—		398
Equity securities		1		2		—		3
	$	385		$16		$—		401
Amounts classified as current assets								(49	)
Investment carrying value							$	352

	December 31, 2016
	Amortized Cost		Unrealized Amounts				Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	345		$9		$(1)	$	353
Money market funds		28		—		—		28
		373		9		(1)		381
Equity securities		1		3		—		4
	$	374		$12		$(1)		385
Amounts classified as current assets								(49	)
Investment carrying value							$	336

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at June 30, 2017 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	96	$	96
Due after one year through five years		71		74
Due after five years through ten years		174		184
Due after ten years		43		44
	$	384	$	398