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Commitments and Contingencies - Additional Information (Detail)
In Millions, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 12 Months Ended
Mar. 12, 2013
USD ($)
Mar. 12, 2013
EUR (€)
May 25, 2010
EUR (€)
Mar. 31, 2007
USD ($)
Feb. 28, 2002
USD ($)
Mar. 31, 2013
USD ($)
Dec. 31, 2002
USD ($)
Dec. 31, 2012
USD ($)
Sep. 19, 2008
Trust
Dec. 05, 2002
USD ($)
Commitments And Contingencies Disclosure [Abstract]                    
Settlement agreement pre-tax charge             $ 850      
Charge covering a cash payment that will be required to make under Settlement agreement upon the effectiveness of an appropriate plan of reorganization             513      
Percentage of annual interest that accrues on Settlement agreement charges from December 21, 2002 to the date of payment             5.50%      
Accrued interest compounded annually included in Settlement agreement and related accrued interest           377   364    
Non - cash charges at fair value market             322      
Original number of shares expect to be issued under Settlement agreement       9,000,000            
Adjustment of company's common stock that is charged and expected to be issued under settlement agreement       To eighteen million shares due to our two-for-one stock split in March 2007            
Original number of shares expected to be issued under Settlement agreement, adjusted       18,000,000            
Amount per common share pre-split                   $ 35.72
Amount per common share post-split                   $ 17.86
Par value of common stock reserved for issuance related to the Settlement agreement       0.9     0.9      
Excess of the aggregate fair value market over aggregated par value of common shares             321      
Legal and related fees related to Settlement agreement             16      
Establishment of asbestos trust under Section 524(g)                 2  
Voting Declaration with respect to the PI Settlement Plan           According to the Voting Declaration, with respect to each class of claims designated as impaired by Grace, the PI Settlement Plan has been approved by holders of at least two-thirds in amount and more than one-half in number (or for classes voting for purposes of Section 524(g) of the Bankruptcy Code, at least 75% in number) of voted claims        
Minimum percentage of holders required to approve PI settlement under bankruptcy code           75.00%        
Charges accrued for potential liabilities         172          
Repayment of grant monies paid $ 13.0 € 10.1 € 5.1