Investments of Insurance Subsidiaries (Tables)

9 Months Ended

Sep. 30, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

A summary of our insurance subsidiaries’ investments at September 30, 2016 and December 31, 2015 follows (dollars in millions):

	September 30, 2016
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	368		$20		$—		$	388
Money market funds		11		—		—			11
		379		20		—			399
Equity securities		1		3		—			4
	$	380		$23		$—			403
Amounts classified as current assets									(49	)
Investment carrying value								$	354
	December 31, 2015
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	428		$17		$(1	)	$	444
Money market funds		34		—		—			34
		462		17		(1	)		478
Equity securities		—		4		—			4
	$	462		$21		$(1	)		482
Amounts classified as current assets									(50	)
Investment carrying value								$	432

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at September 30, 2016 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	66	$	66
Due after one year through five years		123		127
Due after five years through ten years		140		152
Due after ten years		50		54
	$	379	$	399