Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2011

FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]

Fair value information of assets and liabilities measured at fair value on a recurring basis

	December 31, 2011								December 31, 2010
$ in millions	Carrying Value				Fair Value				Carrying Value				Fair Value
Financial Assets (Liabilities)
Marketable Securities
Trading		$	219			$	219			$	320			$	320
Available-for-Sale			4				4				10				10
Held-to-Maturity time deposits			250				250
Derivatives			7				7				11				11
Long-term debt, including current portion			(3,940	)			(4,675	)			(4,724	)			(5,100	)

Notional values of our derivative portfolio

	December 31
$ in millions	2011			2010
Designated as cash flow hedges:
Foreign currency buy		$	36		$	40
Foreign currency sell			109			86
Interest rate swaps						200
Not designated as cash flow hedges:
Foreign currency buy			12			8
Foreign currency sell			76			75
Total notional value		$	233		$	409