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Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 22, 2017 | Dec. 29, 2017 | Dec. 30, 2016 | Jun. 29, 2018 | Dec. 29, 2017 | Dec. 30, 2016 | Jun. 29, 2018
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Statutory tax rate | 35.00% |  |  |  |  |  |
Estimated write-down to deferred tax assets balance due to changes in enacted tax rate |  | $ 52 |  |  |  |  |
Estimated write-down to deferred tax asset balance per diluted share (in dollars per share) |  | $ 0.43 |  |  |  |  |
Tax benefit from the impact of lower corporate tax rates in estimated annual rate for fiscal year |  | $ 26 |  |  |  |  |
Tax benefit from the impact of lower corporate tax rates in estimated annual rate for fiscal year, per diluted share (in dollars per share) |  | $ 0.21 |  |  |  |  |
Effective tax rate |  | 39.30% | 30.60% |  | 33.50% | 29.70% |
Income tax expense, adjustment due to changes in enacted tax rate |  | $ 22 |  |  |  |  |
Income tax expense, adjustment due to changes in enacted tax rate, per diluted share (in dollars per share) |  | $ 0.18 |  |  |  |  |
Deferred tax liability for netted foreign E&P |  | $ 25 |  |  | $ 25 |  |
Increase in deferred tax liability due to potential cumulative basis differences in netted foreign E&P |  | $ 116 |  |  | $ 116 |  |
Scenario, Forecast |  |  |  |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |  |  |  |
Statutory tax rate |  |  |  | 21.00% |  |  | 28.00%

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