Asset Retirement Obligations (Tables)

3 Months Ended

12 Months Ended

Mar. 31, 2013

Dec. 31, 2012

Summary of Changes in AROs

The changes in AROs during the three months ended March 31, 2013 were as follows:

	Three Months Ended March 31, 2013
Beginning balance, December 31, 2012	$	113
Additions		1
Accretion expense		2
Changes in estimates, including cost and timing of cash flows		(4	)
Settlements/payments		(1	)
Ending balance, March 31, 2013	$	111
Current portion included in accrued liabilities	$	6
Noncurrent portion	$	105

A summary of the changes in the AROs during the year ended December 31, 2012 is as follows:

	Successor						Predecessor
	Year Ended December 31, 2012			Eleven Months Ended December 31, 2011			One Month Ended January 31, 2011
Beginning balance	$	30		$	29		$	19
Additions		7			—			—
Accretion expense		5			2			—
Changes in estimates, including cost and timing of cash flows		9			1			—
Settlements/payments		(1	)		(2	)		—
AROs acquired in the acquisition of the mineral sands business		58			—			—
Fresh-start adjustments		—			—			10
Ending balance	$	108		$	30		$	29
Current portion included in accrued liabilities	$	2		$	1		$	1
Noncurrent portion	$	106		$	29		$	28

Summary of AROs by Country

AROs, by geographic region, were as follows:

	At March 31, 2013
Australia	$	67
South Africa		32
The Netherlands		11
United States		1
Total	$	111

A summary of the AROs is included in the table below:

Australia	$	62
South Africa		34
Botlek		11
Hamilton		1
Total AROs	$	108