Shareholders' Equity (Narrative) (Details)	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Class of Stock [Line Items]
Common Stock, Conversion Basis	one-for-one
Number of common shares issued reflects conversion of Class B to Class A	14,471	37,936	40,549
Preferred stock, shares authorized	10,000,000
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock voting rights	one-tenth
Minimum percentage of the board of directors to be elected by class of shares	25.00%
Offering and sale of common stock	43,627,531	43,613,060
Class B Common Stock [Member]
Class of Stock [Line Items]
Common stock voting rights	one
Offering and sale of common stock	7,652,182	7,666,653