Postretirement Healthcare Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2010

Postretirement Healthcare Benefit Plans

Changes in the U.S and foreign postretirememnt healthcare benefit plans' benefit obligations, assets and funded status of plans recognized in the balance sheet

		U.S. Postretirement Healthcare Benefits December 31,						Foreign Postretirement Healthcare Benefits December 31,

(US$ in millions)		2010			2009			2010			2009
Change in benefit obligations:
Benefit obligation as of beginning of year		$	26		$	25		$	111		$	72
Service cost			—			—			1			2
Interest cost			2			2			10			10
Actuarial (gain) loss, net			(6	)		1			12			11
Employee contributions			1			1			—			—
Net transfers in			—			—			—			4
Plan amendments			—			—			—			(8	)
Plan settlements/divestitures			—			—			(32	)		—
Effect of acquisitions			—			—			1			—
Benefits paid			(3	)		(3	)		(8	)		(6	)
Impact of foreign exchange rates			—			—			5			26

Benefit obligation as of end of year		$	20		$	26		$	100		$	111

Change in plan assets:
Employer contributions		$	2		$	2		$	8		$	6
Employee contributions			1			1			—			—
Benefits paid			(3	)		(3	)		(8	)		(6	)

Fair value of plan assets as of end of year		$	—		$	—		$	—		$	—

Funded status and net amounts recognized:
Plan assets less than benefit obligation		$	(20	)	$	(26	)	$	(100	)	$	(111	)
Net liability recognized in the balance sheet		$	(20	)	$	(26	)	$	(100	)	$	(111	)

Amounts recognized in the balance sheet consist of:
Current liabilities		$	(2	)	$	(3	)	$	(8	)	$	(7	)
Non-current liabilities			(18	)		(23	)		(92	)		(104	)

Net liability recognized		$	(20	)	$	(26	)	$	(100	)	$	(111	)

Net periodic benefit cost for U.S. and foreign postretirement healthcare benefit plans

		U.S. Postretirement Healthcare Benefits Year Ended December 31,									Foreign Postretirement Healthcare Benefits Year Ended December 31,

(US$ in millions)		2010			2009			2008			2010			2009			2008
Service cost		$	—		$	—		$	—		$	1		$	2		$	1
Interest cost			2			2			1			10			10			6
Amortization of prior service cost			—			—			—			(1	)		—			—
Amortization of net loss			—			—			—			2			—			1
Settlement gain recognized			—			—			—			(26	)		—			—

Net periodic benefit costs		$	2		$	2		$	1		$	(14	)	$	12		$	8

Weighted average assumptions used in determining the benefit obligation under the U.S. and foreign postretirement healthcare benefit plans

		U.S. Postretirement Healthcare Benefits December 31,						Foreign Postretirement Healthcare Benefits December 31,

		2010			2009			2010			2009
Discount rate			5.3	%		5.8	%		10.8	%		11.3	%

Weighted average assumptions used in determining the net periodic benefit cost under the U.S. and foreign postretirement healthcare benefit plans

		U.S. Postretirement Healthcare Benefits Year Ended December 31,									Foreign Postretirement Healthcare Benefits Year Ended December 31,

		2010			2009			2008			2010			2009			2008
Discount rate			5.8	%		6.5	%		6.4	%		11.3	%		12.4	%		9.3	%

Effects of one-percentage-point change in assumed health care cost trend rates

(US$ in millions)		One percentage point increase			One percentage point decrease

Effect on total service and interest cost—U.S. plans		$	—		$	—
Effect on total service and interest cost—Foreign plans		$	1		$	(1	)
Effect on postretirement benefit obligation—U.S. plans		$	1		$	(1	)
Effect on postretirement benefit obligation—Foreign plans		$	12		$	(10	)

Estimated future benefit payments for U.S. and foreign postretirement healthcare benefit plans

(US$ in millions)		U.S. Postretirement Healthcare Benefit Expected Payments			Foreign Postretirement Healthcare Benefit Expected Payments

2011		$	2		$	8
2012			2			8
2013			2			8
2014			2			9
2015			2			9
2016-2020			7			51