Shareholders' Equity (Earnings Per Common Share) (Details) - Common Class A - shares	3 Months Ended
	Dec. 29, 2018	Sep. 30, 2017	Jul. 02, 2016
Tangible equity units senior amortizing note
Class of Stock [Line Items]
Incremental common shares attributable to dilutive effect of conversion of debt securities (in shares)			0.3969
Equity Component | Minimum
Class of Stock [Line Items]
Convertible, number of equity instruments per contract (in shares)	1.9841	1.9841	1.9841
Equity Component | Maximum
Class of Stock [Line Items]
Convertible, number of equity instruments per contract (in shares)	2.3810		2.3810