GOODWILL: (Tables)

3 Months Ended

Mar. 31, 2013

GOODWILL:

Schedule of goodwill balances and activity by segment

										Titanium
				Surface			Performance			Dioxide			Advanced			Corporate
($ in millions)	Lithium			Treatment			Additives			Pigments			Ceramics			and other			Total
Gross balance, December 31, 2012	$	263.7		$	342.1		$	456.6		$	247.7		$	254.3		$	17.9		$	1,582.3
Accumulated impairment	—			—			(456.6		)	(247.7		)	—			(13.2		)	(717.5		)
Net balance, December 31, 2012	263.7			342.1			—			—			254.3			4.7			864.8
Foreign exchange	(7.5		)	(8.6		)	—			—			(7.4		)	(0.1		)	(23.6		)
Net balance, March 31, 2013	256.2			333.5			—			—			246.9			4.6			841.2
Accumulated impairment	—			—			456.6			247.7			—			13.2			717.5
Gross balance, March 31, 2013	$	256.2		$	333.5		$	456.6		$	247.7		$	246.9		$	17.8		$	1,558.7