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Acquisitions - Divestures (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net cash proceeds     $ 93 $ 0
Net gain on sale of business(c) $ 101 $ 0 101 $ 0
Remeasurement of retained noncontrolling investment to fair value 24   $ 24  
Pumpkin Insurance Services        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net cash proceeds 93      
Sale proceeds 99      
net of cash sold amount 6      
Net gain on sale of business(c) $ 101