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Contingencies - Other Matters (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Contingencies      
Loss contingency accrual $ 13 $ 13 $ 20
Loss contingency payment 2    
Loss contingency accrual decrease (5)    
Gain from favorable court ruling 69 $ 69  
Income tax expense related to litigation settlement $ 28