Derivative Instruments and Hedging Activities (Fair Value Of Outstanding Designated And Undesignated Derivative Assets And Liabilities) (Details) - USD ($) $ in Thousands	Sep. 28, 2019	Sep. 29, 2018
Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	$ 907	$ 8,491
Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	251	173
Designated hedge derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	907	8,400
Designated hedge derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	133	173
Undesignated hedge derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	0	91
Undesignated hedge derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	118	0
Cash flow derivatives
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	907	989
Cash flow derivatives | Designated hedge derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value	907	989
Cash flow derivatives | Designated hedge derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value	$ 133	173
Interest rate swaps | Designated hedge derivatives | Prepaid Expenses and Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value		7,411
Interest rate swaps | Designated hedge derivatives | Other Accrued Liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value		$ 0