Stock-Based Compensation, Employee Stock Purchase Plan (Details) - ESP Plan [Member] - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Dec. 26, 2015 |
Dec. 27, 2014 |
Dec. 26, 2015 |
Dec. 27, 2014 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term | 6 months | 6 months | 6 months | 6 months |
| Risk-free interest rate | 0.40% | 0.10% | 0.40% | 0.10% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate | 33.10% | 26.40% | 33.10% | 26.40% |
| Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate | 3.60% | 3.50% | 3.60% | 3.50% |
| Unrecognized compensation costs related to unvested units | $ 7.5 | $ 7.7 | $ 7.5 | $ 7.7 |