Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Millions |
Mar. 26, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Estimated fair values of debt instruments | $ 16,100 | $ 16,200 |
| Outstanding principal amount of debt instruments | 15,300 | 15,300 |
| Unamortized discounts and issuance costs | 1,000 | 1,000 |
| Interest rate swaps | Designated as hedges | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Aggregate notional amount of derivatives | 1,200 | 1,200 |
| Derivative liability, fair value | 5 | 1 |
| Foreign currency contracts | Designated as hedges | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Aggregate notional amount of derivatives | 4,200 | 4,000 |
| Derivative liability, fair value | $ 78 | $ 57 |