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v3.21.1

Commitments and Contingencies (Schedule Of Settlement And Defense Costs) (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 USD ($) claim | Mar. 31, 2020 USD ($) claim | Dec. 31, 2020 USD ($) claim | Dec. 31, 2019 USD ($) claim | Dec. 31, 2018 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |
Pre-tax cash payments | $ 10,800,000 | $ 11,700,000 |  |  |
Estimated Funds Available From Post Bankruptcy Trusts To Pay Current And Future Claimants | 36,000,000,000 |  |  |  |
Current asbestos liability | $ 66,500,000 |  | $ 66,500,000 |  |
Asbestos Commitments and Contingencies |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Estimated Percentage Of Insurance Which Covers Asbestos Costs |  |  |  | 14.00% |
Asbestos Cumulative Claims Resolved | claim | 142,000 |  |  |  |
Loss Contingency, Pending Claims, Number | claim | 29,407 | 29,162 | 29,138 | 29,056 |
Settlement / indemnity costs incurred (1) | $ 5,500,000 | $ 8,200,000 | $ 35,300,000 |  |
Defense costs incurred (1) | 3,600,000 | 4,400,000 | 15,600,000 |  |
Gross Settlement And Defense Incurred Costs | 9,100,000 | 12,600,000 | 50,900,000 |  |
Settlement / indemnity payments | 10,100,000 | 11,000,000.0 | 24,700,000 |  |
Defense payments | 3,200,000 | 4,300,000 | 16,700,000 |  |
Insurance receipts | 2,500,000 | 3,600,000 | 10,300,000 |  |
Pre-tax cash payments | 10,800,000 | $ 11,700,000 | 31,100,000 |  |
Cumulative Related Settlement Cost Incurred Before Insurance Recoveries | 684,000,000 |  |  |  |
Cumulative Asbestos Settlement Cost Per Resolved Claim | 4,800 |  |  |  |
Asbestos Settlement Cost Per Resolved Claim |  |  | 13,900 | $ 15,800 | $ 11,300
Increase In Total Asbestos Liability |  |  |  | 255,000,000 |
Insurance Receivable Asbestos | 84,000,000 |  | 87,000,000 | 98,000,000 |
Asbestos Liability | 657,000,000 |  | 670,000,000 | $ 712,000,000 |
Percentage Of Asbestos Liability Attributable To Settlement And Defense Costs For Future Claims |  |  |  | 85.00% |
Current asbestos liability | 66,500,000 |  | $ 66,500,000 |  |
Aggregate Value Of Policy Buy Out Agreements | $ 82,500,000 |  |  |  |

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- Definition Cumulative number of asbestos-related claims resolved by settlement or dismissal. + References No definition available. + Details
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- Definition The cumulative average settlement cost incurred before insurance recoveries per resolved claim. + References No definition available. + Details
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