Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands			9 Months Ended
	Jul. 06, 2016	Jun. 23, 2016	May 28, 2016	May 30, 2015
Components Of Shareholders Equity [Line Items]
Regular dividends cash paid			$ 79,351	$ 74,143
Cash dividends paid				259,546
Special dividends cash paid				$ 185,403
Dividends declared date			Jun. 23, 2016
Dividend payable date			Jul. 26, 2016
Dividends record date			Jul. 12, 2016
Purchase of treasury stock			$ 19,372
Subsequent Event [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid		$ 26,428
Dividends payable per share		$ 0.43
Subsequent Event [Member] | Proposed Tender Offer [Member]
Components Of Shareholders Equity [Line Items]
Principal amounts of notes to be sold	$ 175,000
Subsequent Event [Member] | Proposed Tender Offer [Member] | Minimum [Member]
Components Of Shareholders Equity [Line Items]
Repurchase period			20 days
Regular Dividends [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid per common share			$ 1.29	$ 1.20
Regular dividends cash paid			$ 79,351	$ 74,143
Special Dividends [Member]
Components Of Shareholders Equity [Line Items]
Cash dividends paid per common share				$ 3.00
Special dividends cash paid				$ 185,403
Class A Common Stock [Member] | Subsequent Event [Member] | Proposed Tender Offer [Member]
Components Of Shareholders Equity [Line Items]
Authorized amount of repurchase	$ 300,000
Class A Common Stock [Member] | Subsequent Event [Member] | Proposed Tender Offer [Member] | Minimum [Member]
Components Of Shareholders Equity [Line Items]
Class A common stock shares repurchase amount, per share	$ 66.00
Class A Common Stock [Member] | Subsequent Event [Member] | Proposed Tender Offer [Member] | Maximum [Member]
Components Of Shareholders Equity [Line Items]
Class A common stock shares repurchase amount, per share	$ 72.50
Class A Treasury Stock [Member]
Components Of Shareholders Equity [Line Items]
Class A common stock shares repurchased			335
Purchase of treasury stock			$ 19,372
Shares repurchased by the company for associates' tax withholding liability associated with share-based compensation			37
Maximum number of shares that can be repurchased			1,444