Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 30, 2017	Dec. 31, 2016
Tax Cuts and Jobs Act of 2017 [Line Items]
Tax Reform Income Tax Expense	$ 124,500
Transition Tax for Accumulated Foreign Earnings	101,800
Deferred Tax Liabilities, Undistributed Foreign Earnings	22,700
Income tax expense	$ 127,534	$ 2,847
Effective income tax rate	439.20%	9.20%
Tax Reform Effective Income Tax Rate Reconciliation, Percent	428.80%
Long-term accrued income taxes payable
Tax Cuts and Jobs Act of 2017 [Line Items]
Tax Reform Income Tax Expense	$ 99,900
Deferred income tax liabilities
Tax Cuts and Jobs Act of 2017 [Line Items]
Tax Reform Income Tax Expense	21,900
Other accrued liabilities
Tax Cuts and Jobs Act of 2017 [Line Items]
Tax Reform Income Tax Expense	$ 2,700