Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value - Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details)

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Assets and Liabilities Measured at Fair Value - Assets And Liabilities Measured At Fair Value On A Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Recurring    
Assets and liabilities measured at fair value    
Cash equivalents $ 260 $ 290
Indemnification asset 394 345
Financial instrument assets 92 23
Debt 1,983 1,750
Recurring | Fair Value, Inputs, Level 1 [Member]    
Assets and liabilities measured at fair value    
Cash equivalents 260 290
Recurring | Significant Other Observable Inputs (Level 2)    
Assets and liabilities measured at fair value    
Indemnification asset 394 345
Financial instrument assets 92 23
Debt $ 1,983 $ 1,750
1.75% Exchangeable Senior Debentures due 2046    
Assets and liabilities measured at fair value    
Interest rate (as a percent) 1.75%