Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Compensation and Retirement Disclosure [Abstract] | |||
| Defined benefit plan amounts recognized in other assets | $ 343 | $ 257 | |
| Defined benefit plan amounts recognized in other liabilities and accrued expenses | 478 | 415 | |
| Contribution to employer-sponsored U.S. and non-U.S. defined contribution plans | $ 261 | $ 254 | $ 240 |