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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Income taxes          
Effective tax rate on income from continuing operations (as a percent) 20.70% 21.80% 20.00% 20.50%  
Valuation allowance, deferred tax assets $ 68   $ 68   $ 65
Gross unrecognized tax benefits 152   152   150
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized 124   124   120
Additions to unrecognized tax benefits for tax positions of prior years   $ 71      
Reductions to unrecognized tax benefits for tax positions of prior years   80      
Amount of decrease in unrecognized tax benefits reasonably possible within next 12 months 13   13    
Increase (decrease) in interest and penalties 1 $ 2 4 $ 10  
Payable related to accrued interest and penalties 30   30   26
Estimated CAMT 43   43   $ 0
State net operating losses          
Income taxes          
Valuation allowance, deferred tax assets 31   31    
State deferred tax assets          
Income taxes          
Valuation allowance, deferred tax assets 2   2    
Foreign net operating losses          
Income taxes          
Valuation allowance, deferred tax assets 35   35    
State          
Income taxes          
Deferred tax assets, loss carryforwards 32   32    
Foreign          
Income taxes          
Deferred tax assets, loss carryforwards 47   47    
Domestic Tax Jurisdiction          
Income taxes          
Deferred tax assets, loss carryforwards $ 43   $ 43