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TAXES ON EARNINGS - Income Tax Rate Reconciliation (Details)
12 Months Ended
Sep. 28, 2018
Sep. 29, 2017
Sep. 30, 2016
Income Tax Disclosure [Abstract]      
Federal statutory income tax rate 24.50% 35.00% 35.00%
State and local taxes, net of federal tax benefit 1.10% 1.30% 2.40%
Revaluation of deferred tax liabilities for US statutory change (41.80%) 0.00% 0.00%
Mandatory repatriation tax on foreign earnings 13.00% 0.00% 0.00%
Domestic production activities deduction (0.80%) (2.40%) (2.20%)
Research and development credit (11.10%) (2.60%) (2.20%)
Prior year deferred tax adjustments 1.90% (4.00%) 0.00%
Change in valuation allowance (1.90%) 3.80% 0.00%
Other 5.00% (0.60%) 1.30%
Effective tax rate (10.10%) 30.50% 34.30%