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Earnings Per Share and Certain Related Information (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 23, 2015 | Jun. 29, 2018 | Jun. 30, 2017 | Jun. 29, 2018 | Jun. 30, 2017
Numerator for Basic and Diluted EPS: |  |  |  |  |
Net income |  | $ 150,222,000 | $ 89,032,000 | $ 200,972,000 | $ 199,586,000
Net income allocated to participating securities |  | (629,000) | (904,000) | (898,000) | (2,237,000)
Net income allocated to common stock for EPS calculation |  | $ 149,593,000 | $ 88,128,000 | $ 200,074,000 | $ 197,349,000
Denominator for Basic and Diluted EPS: |  |  |  |  |
Weighted average basic shares (in shares) |  | 142,612,000 | 120,429,000 | 136,717,000 | 120,773,000
Shares allocated to participating securities (in shares) |  | (597,000) | (1,223,000) | (743,000) | (1,413,000)
Shares used for calculating basic EPS attributable to common stock (in shares) |  | 142,015,000 | 119,206,000 | 135,974,000 | 119,360,000
Effect of dilutive securities: |  |  |  |  |
Stock compensation plans (in shares) |  | 1,014,000 | 650,000 | 1,028,000 | 794,000
Shares used for calculating diluted EPS attributable to common stock (in shares) |  | 143,029,000 | 119,856,000 | 137,002,000 | 120,154,000
Basic (in dollars per share) |  | $ 1.05 | $ 0.74 | $ 1.47 | $ 1.65
Diluted (in dollars per share) |  | $ 1.05 | $ 0.74 | $ 1.46 | $ 1.64
Share Repurchases |  |  |  |  |
Amount authorized to be repurchased | $ 500,000,000.0 |  |  |  |
Average cost per share repurchased (in dollars per share) | $ 60.77 |  |  |  |
Number of shares repurchased (in shares) | 49,074 | 0 |  |  |

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