Fair Value Measurements - Schedule of Investment Maturities (Details) - Fair Value - USD ($) $ in Millions |
Mar. 25, 2016 |
Dec. 25, 2015 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Less than 1 year | $ 375 | $ 810 |
| 1 - 2 years | 3 | 9 |
| 2 - 5 years | 12 | 27 |
| Greater than 5 years | 65 | 73 |
| Total | $ 455 | $ 919 |