Intangible Assets, Net

6 Months Ended

12 Months Ended

Jun. 30, 2013

Dec. 31, 2012

Intangible Assets, Net

9. Intangible Assets, Net

The gross cost and accumulated amortization of intangible assets, by major intangible asset category, were as follows:

	June 30, 2013
	Gross Cost		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	294	$	(49	)	$	245
TiO2 technology		32		(4	)		28
Internal-use software		39		(4	)		35
Other		9		(4	)		5
Total	$	374	$	(61	)	$	313

	December 31, 2012
	Gross Cost		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	294	$	(39	)	$	255
TiO2 technology		32		(3	)		29
Internal-use software		38		(2	)		36
Other		9		(3	)		6
Total	$	373	$	(47	)	$	326

Amortization expense related to intangible assets for the three months ended June 30, 2013 and 2012 was $7 million and $6 million, respectively, and for six months ended June 30, 2013 and 2012 was $14 million and $12 million, respectively.

Estimated future amortization expense related to intangible assets was as follows:

	Total Amortization
2013	$	14
2014		27
2015		26
2016		25
2017		25
Thereafter		196
Total	$	313

10. Intangible Assets

The gross cost and accumulated amortization of intangible assets, by major intangible asset category, were as follows:

	Successor
	December 31, 2012
	Gross Cost		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	294	$	(39	)	$	255
TiO2 technology		32		(3	)		29
Internal-use software(1)		38		(2	)		36
In-process research and development		5		(2	)		3
Trade names		3		(1	)		2
Other		1		—			1
Total	$	373	$	(47	)	$	326

(1) In connection with the Transaction, the Company acquired internal-use software, which was valued at $12 million on the Transaction Date. See Note 5.

	Successor
	December 31, 2011
	Gross Cost		Accumulated Amortization			Net Carrying Amount
Customer relationships	$	294	$	(19	)	$	275
TiO2 technology		32		(2	)		30
Internal-use software		12		—			12
In-process research and development		5		(1	)		4
Trade names		3		—			3
Other		1		—			1
Total	$	347	$	(22	)	$	325

Internal-use software relates to internal and external costs incurred during the development stage, which were being capitalized during 2011 and 2012. During 2012, the Company began amortizing such costs. Amortization expense related to intangible assets for the year ended December 31, 2012, the eleven months ended December 31, 2011, the one month ended January 31, 2011 and year ended December 31, 2010 was $25 million, $22 million, $0 and $0, respectively.

Estimated future amortization expense related to intangible assets is as follows:

	Total Amortization
2013	$	27
2014		27
2015		27
2016		25
2017		25
Thereafter		195
Total	$	326