Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Dec. 31, 2016 |
|
| Derivatives, Fair Value [Line Items] | |||
| Derivative liability fair value of collateral | $ 200 | $ 200 | |
| New Net Investment Hedges | Euro Denominated Debt | |||
| Derivatives, Fair Value [Line Items] | |||
| Notional amount | 800 | 800 | |
| New Interest Rate Swaps | Fair Value Hedges | |||
| Derivatives, Fair Value [Line Items] | |||
| Notional amount | 3,500 | ||
| Forward Interest Rate Swaps | |||
| Derivatives, Fair Value [Line Items] | |||
| Pre-tax gains (loss) recognized in other comprehensive income (loss) | $ (100) | ||
| Cross Currency Swaps | |||
| Derivatives, Fair Value [Line Items] | |||
| Notional amount | 12,890 | $ 12,890 | |
| Pre-tax gains (loss) recognized in other comprehensive income (loss) | $ 100 | $ 200 | |