Derivatives and Hedging - Summary of Gains (Losses) Recognized in Condensed Consolidated Statements of Income on Derivative Instruments (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Derivative Instruments Gain Loss [Line Items] | ||||
| Total gain (loss) from derivative instruments | $ (63) | $ (91) | $ (77) | $ (56) |
| Forward Foreign Currency Exchange Contracts [Member] | Other General and Administration Expense [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Total gain (loss) from derivative instruments | (49) | (93) | (13) | (63) |
| Total Return Swaps [Member] | Nonoperating Income (Expense) [Member] | ||||
| Derivative Instruments Gain Loss [Line Items] | ||||
| Total gain (loss) from derivative instruments | $ (14) | $ 2 | $ (64) | $ 7 |