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Commitments and Contingent Liabilities - Asbestos Claims Activity (Details) - Asbestos Related Product Liability $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) claim | Dec. 31, 2019 USD ($) claim | Dec. 31, 2018 USD ($) claim
Number of claims filed |  |  |
Pending claims, beginning of year | 39,600 | 43,100 | 54,300
New claims filed during the year | 1,100 | 1,500 | 1,300
Claims settled/dismissed | (2,000) | (5,000) | (12,500)
Pending claims, end of year | 38,700 | 39,600 | 43,100
Payments | $ | $ 13 | $ 22 | $ 18

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