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Income Taxes (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Income Taxes          
Effective tax rate of income (loss) before income taxes 24.20%   24.30% 23.90% 23.90%
Excess tax benefits associated with equity-based compensation $ 3   $ 2 $ 10 $ 12
Equity in net losses of unconsolidated entities 12   17 23 32
2017 Audit [Member]          
Income Taxes          
Income tax deposit paid   $ 103      
Low income housing investments [Member]          
Income Taxes          
Equity in net losses of unconsolidated entities 12   17 25 31
Income tax benefit from low-income housing investments 26   25 48 48
Interest expense $ 3   $ 4 $ 7 $ 6