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Commitments and Contingencies - Other Litigation and Other Matters - Additional Information (Detail) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) Customer | Dec. 31, 2019 | Dec. 31, 2018
Chemicals | TiO2 Product |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Sale of TiO2, number of customers | Customer | 4,000 |  |
Chemicals | Customer Concentration Risk | Net Sales |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00%
Component Products Segment | Customer Concentration Risk | Top Ten Customers | Net Sales |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 48.00% | 47.00% | 44.00%
Component Products | Customer Concentration Risk | Net Sales | Security Products Reporting Unit |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 17.00% | 14.00% | 13.00%
Real Estate Management And Development | Customer Concentration Risk | Net Sales | Minimum |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00%
TiO2 | Chemicals | TiO2 Product | Net Sales |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 93.00% | 94.00% | 94.00%
TiO2 | Chemicals | Customer Concentration Risk | Top Ten Customers | Net Sales |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Concentration risk percentage | 34.00% | 36.00% | 33.00%
Feedstock Ore | Chemicals |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Minimum purchase commitments | $ 1,200 |  |
Other Supply And Service Contracts | Chemicals |  |  |
Commitments And Contingent Liabilities [Line Items] |  |  |
Minimum purchase commitments | $ 86 |  |

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