Stockholders' Equity and Stock Compensation Plans	6 Months Ended
	Mar. 29, 2020
Stockholders' Equity Note [Abstract]
Stockholders' Equity and Stock Compensation Plans	Stockholders’ Equity and Stock Compensation PlansWe recognize the fair value of our stock-based awards as compensation expense on a straight-line basis over the requisite service period in which the award vests. Stock-based compensation expense for the three and six months ended March 29, 2020 was $5.0 million and $9.4 million, respectively, compared to $4.1 million and $8.6 million for the same periods last year. Most of these amounts were included in SG&A in our consolidated statements of income. In the first half of fiscal 2020 (all in the first quarter), we awarded 74,011 performance share units (“PSUs”) to our non-employee directors and executive officers at a fair value of $99.85 per share on the award date. All of the PSUs are performance-based and vest, if at all, after the conclusion of the three-year performance period. The number of PSUs that ultimately vest is based 50% on the growth in our diluted earnings per share and 50% on our relative total shareholder return over the vesting period. Additionally, we awarded 163,525 restricted stock units (“RSUs”) to our non-employee directors, executive officers and employees at a fair value of $84.01 per share on the award date. All executive officer and employee RSUs have time-based vesting over a four-year period, and the non-employee director RSUs vest after one year.