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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Income taxes      
Effective tax rate on income from continuing operations (as a percent) 15.10% 18.80%  
Valuation allowance, deferred tax assets $ 68   $ 67
Gross unrecognized tax benefits 173   164
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized 142   134
Amount of decrease in unrecognized tax benefits reasonably possible within next 12 months 16    
Increase (decrease) in interest and penalties 7 $ 2  
Payable related to accrued interest and penalties 38   $ 31
State net operating losses      
Income taxes      
Valuation allowance, deferred tax assets 32    
State deferred tax assets      
Income taxes      
Valuation allowance, deferred tax assets 2    
Foreign net operating losses      
Income taxes      
Valuation allowance, deferred tax assets 34    
Foreign      
Income taxes      
Deferred tax assets, loss carryforwards 52    
Domestic Tax Jurisdiction      
Income taxes      
Deferred tax assets, loss carryforwards 98    
State      
Income taxes      
Deferred tax assets, loss carryforwards $ 38