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Significant Accounting Policies and Recent Accounting Standards (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Mar. 30, 2018 | Mar. 31, 2017 | Mar. 30, 2018 | Mar. 31, 2017 | Jun. 29, 2018 | Jun. 30, 2017 | Sep. 29, 2017
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Operating income | $ 256 | $ 275 | $ 800 | $ 798 |  |  |
Intra-entity Transfers of Assets Other Than Inventory |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Reduction in prepaid income taxes |  |  |  |  |  |  | $ 27
Increase in non-current deferred income taxes |  |  |  |  |  |  | $ 27
Improving the Presentation of Net Periodic Pension Cost and Postretirement Benefit Cost | Pro Forma |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Operating income |  |  |  |  |  | $ 164 |
Improving the Presentation of Net Periodic Pension Cost and Postretirement Benefit Cost | Scenario, Forecast |  |  |  |  |  |  |
Business Combination, Separately Recognized Transactions [Line Items] |  |  |  |  |  |  |
Operating income |  |  |  |  | $ 183 |  |

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