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Investment in Affiliates and Other Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Capitalized Operating Permit Costs
Dec. 31, 2012
Capitalized Operating Permit Costs
Dec. 31, 2013
Capitalized Operating Permit Costs
Permits Subject to Amortization
Dec. 31, 2012
Capitalized Operating Permit Costs
Permits Subject to Amortization
Dec. 31, 2011
Capitalized Operating Permit Costs
Permits Subject to Amortization
Dec. 31, 2013
Basic Management, Inc.
Dec. 31, 2013
Landwell
Dec. 31, 2013
Basic Management Inc And Landwell
Dec. 31, 2013
LPC
Dec. 31, 2012
CompX
Sep. 30, 2012
CompX
Dec. 31, 2013
CompX
Dec. 31, 2012
CompX
Dec. 31, 2011
CompX
Facilities
Other Assets Non Current [Line Items]                                                  
Purchase of TiO2 from the plant                                       52.00%          
Equity ownership percentage                                 32.00% 12.00%              
Direct controlling interest in subsidiary                                     50.00%            
Net sales $ 400.1 $ 448.2 $ 516.1 $ 499.2 $ 427.4 $ 508.7 $ 568.4 $ 582.8 $ 1,863.6 $ 2,087.3 $ 2,025.1               $ 15.9            
Income (loss) from continuing operations before income taxes                 (217.9) 301.4 460.8               6.9            
Net income (loss) 10.8 (40.9) (48.6) (48.2) 9.2 31.8 61.5 119.6 (126.9) 222.1 295.0               5.3            
Amortization of capitalized operating permit costs                           6.5 4.9 1.3                  
Amortization of capitalized operating permit, 2014                           6.7                      
Amortization of capitalized operating permit, 2015                           6.7                      
Amortization of capitalized operating permit, 2016                           6.7                      
Amortization of capitalized operating permit, 2017                           6.7                      
Amortization of capitalized operating permit, 2018                           6.7                      
Net of accumulated amortization                       18.8 11.8                        
Number of facilities held for sale                                                 2
Assets held for sale write-down                   1.2 1.1                     0.4     1.1
Net proceeds of sale                                             1.6 3.6  
Loss on sale                 $ (0.5) $ 1.5 $ (0.9)                   $ 0.8