Asset Retirement Obligations (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2013

Dec. 31, 2012

Summary of Changes in AROs

The changes in AROs during the six months ended June 30, 2013 were as follows:

	June 30, 2013			December 31, 2012
Beginning balance	$	113		$	30
Additions		2			7
Accretion expense		2			5
Changes in estimates, including cost and timing of cash flows		(14	)		11
Settlements/payments		—			(1	)
AROs acquired in the acquisition of mineral sands business		—			61
Ending balance	$	103		$	113
Current portion included in accrued liabilities	$	7		$	7
Noncurrent portion	$	96		$	106

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:

	June 30, 2013		December 31, 2012
Australia	$	59	$	67
South Africa		32		34
The Netherlands		11		11
United States		1		1
Total	$	103	$	113

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

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