Investments of Insurance Subsidiaries (Tables)

3 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Schedule of Investments

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

	March 31, 2016
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	415	$	20	$	(1	)	$	434
Money market funds		39		—		—			39
		454		20		(1	)		473
Equity securities		1		3		—			4
	$	455	$	23	$	(1	)		477
Amounts classified as current assets									(52	)
Investment carrying value								$	425

	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 March 31, 2016 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	92	$	92
Due after one year through five years		152		156
Due after five years through ten years		135		146
Due after ten years		75		79
	$	454	$	473