Fair Value of Financial Instruments - Financial Assets and Liabilities Not Carried at Fair Value (Detail) - USD ($) $ in Millions |
Sep. 30, 2021 |
Dec. 31, 2020 |
---|---|---|
Fair Value | ||
Financial liabilities: | ||
Short-term and long-term debt (a) | $ 4,663 | $ 5,323 |
Carrying Amount | ||
Financial liabilities: | ||
Short-term and long-term debt (a) | $ 3,996 | $ 4,806 |