Shareholders' Equity - (Earnings Per Common Share) (Details) - Common Class A [Member] - shares	3 Months Ended		12 Months Ended
	Dec. 30, 2017	Jul. 02, 2016	Sep. 29, 2018
Tangible Equity Units Senior Amortizing Note [Member]
Class of Stock [Line Items]
Incremental common shares attributable to dilutive effect of conversion of debt securities		0.3969
Equity Component [Member] | Minimum [Member]
Class of Stock [Line Items]
Number of equity instruments per contract (in shares)	1.9841	1.9841	1.9841
Equity Component [Member] | Maximum [Member]
Class of Stock [Line Items]
Number of equity instruments per contract (in shares)		2.3810	2.3810