| **Receivables**            | 6 Months Ended                                                                                                                                                                                                                                                                                                                                 |
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| **Receivables [Abstract]** |                                                                                                                                                                                                                                                                                                                                           |
| Receivables                | ReceivablesReceivables are summarized below:  December 30, 2016 July 1, 2016     (In millions)Accounts receivable$469 $526Unbilled costs and accrued earnings on cost-plus contracts297 346 766 872Less allowances for collection losses(4) (1) $762 $871 |

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| - Definition
The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.
+ References
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| - References
No definition available.
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