Investments of Insurance Subsidiaries (Tables)

12 Months Ended

Dec. 31, 2013

Investments Debt And Equity Securities [Abstract]

Schedule of Investments

A summary of the insurance subsidiaries’ investments at December 31 follows (dollars in millions):

	2013
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	385	$	11	$	(3	)	$	393
Auction rate securities		7		—		—			7
Asset-backed securities		12		—		—			12
Money market funds		94		—		—			94
		498		11		(3	)		506
Equity securities		2		2		—			4
	$	500	$	13	$	(3	)		510
Amounts classified as current assets									(62	)
Investment carrying value								$	448

	2012
	Amortized Cost		Unrealized Amounts					Fair Value
			Gains		Losses
Debt securities:
States and municipalities	$	395	$	23	$	—		$	418
Auction rate securities		74		—		(6	)		68
Asset-backed securities		14		—		—			14
Money market funds		67		—		—			67
		550		23		(6	)		567
Equity securities		2		1		—			3
	$	552	$	24	$	(6	)		570
Amounts classified as current assets									(55	)
Investment carrying value								$	515

Schedule of Maturities of Investments

Scheduled maturities of investments in debt securities at December 31, 2013 were as follows (dollars in millions):

	Amortized Cost		Fair Value
Due in one year or less	$	110	$	110
Due after one year through five years		180		186
Due after five years through ten years		100		102
Due after ten years		89		89
		479		487
Auction rate securities		7		7
Asset-backed securities		12		12
	$	498	$	506