Other Noncurrent Assets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Other noncurrent assets
Investment in affiliates	$ 125.1	$ 105.7
Waste disposal site operating permits, net	70.3	66.6
Restricted cash	10.6	7.6
Assets held for sale	7.3	7.3
IBNR receivables	6.8	6.5
Capital lease deposit	6.2	6.2
Deferred financing costs	5.9	2.0
Other intangible assets	1.7	2.1
Other	44.2	67.9
Total	153.0	166.2
TiO2 Manufacturing Joint Venture, Louisiana Pigment Company, L.P. ("LPC") [Member]
Other noncurrent assets
Investment in affiliates	108.6	89.2
Other [Member]
Other noncurrent assets
Investment in affiliates	$ 16.5	$ 16.5

Other assets that are held for sale apart from normal operations, not otherwise included elsewhere in the taxonomy and which are anticipated to be sold in less than one year, but by their nature which are not considered current (originally classified based on not being realized or converted to working capital within one year of the date of the statement of financial position or operating cycle, if longer).

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