Fair Value Disclosure (Tables)

6 Months Ended

Jun. 30, 2011

Fair Value Disclosure

Schedule of the three input levels in the hierarchy of fair value measurements

Input Level	Description of Input
Level 1	Observable inputs such as quoted market prices in active markets.
Level 2	Inputs other than quoted prices in active markets that are either directly or indirectly observable.
Level 3	Unobservable inputs in which little or no market data exists.

Schedule of assets and liabilities that are measured at fair value on a recurring basis

			June 30, 2011				December 31, 2010
	Input Level		Carrying Amount		Fair Value		Carrying Amount		Fair Value
			(Dollars in millions)
Assets—Investment securities		3	$	78		78		—		—
Liabilities—Long-term debt, excluding capital lease obligations		2	$	21,029		21,516		7,328		8,007