Balance Sheet Details (Details) $ in Thousands, € in Millions	3 Months Ended	9 Months Ended
	Jul. 04, 2020 USD ($)	Jul. 04, 2020 USD ($)	Jun. 29, 2019 USD ($)	Sep. 28, 2019 USD ($)	Mar. 30, 2019 USD ($)	Mar. 30, 2019 EUR (€)
Inventory, Net [Abstract]
Purchased parts and assemblies	$ 127,885	$ 127,885		$ 134,298
Work-in-process	178,801	178,801		174,550
Finished goods	142,286	142,286		133,682
Total inventories	448,972	448,972		442,530
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid and refundable income taxes	56,467	56,467		44,096
Other taxes receivable	9,410	9,410		11,208
Prepaid expenses and other assets	24,360	24,360		22,689
Total prepaid expenses and other assets	90,237	90,237		77,993
Other Assets, Noncurrent Disclosure [Abstract]
Assets related to deferred compensation arrangements	35,042	35,042		35,842
Deferred tax assets	103,507	103,507		87,011
Right of use assets, net - operating leases (See Note 11)	79,640	79,640		0
Right of use assets, net - finance leases (See Note 11)	723	723		0
Other assets	14,030	14,030		18,111
Total other assets	232,942	232,942		140,964
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Non-cash impairment charge on investment	2,500	2,472	$ 0
Other Liabilities, Current [Abstract]
Accrued payroll and benefits	53,355	53,355		55,698
Operating lease liability, current (See Note 11)	13,990	13,990		0
Finance lease liability, current (See Note 11)	384	384		0
Deferred revenue	30,071	30,071		23,695
Warranty reserve	34,971	34,971		36,460
Accrued expenses and other	30,528	30,528		41,039
Customer deposits	11,258	11,258		10,843
Total other current liabilities	174,557	174,557		167,735
Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward]
Beginning balance		36,460	40,220
Additions related to current period sales		28,669	38,968
Warranty costs incurred in the current period		(30,773)	(41,204)
Accruals resulting from acquisitions		0	21
Adjustments to accruals related to foreign exchange and other		615	(453)
Ending balance	34,971	34,971	$ 37,552
Other Liabilities, Noncurrent [Abstract]
Long-term taxes payable	15,554	15,554		37,385
Operating lease liability, long-term (See Note 11)	70,091	70,091		0
Finance lease liability, long-term (See Note 11)	240	240		0
Deferred compensation	38,704	38,704		39,715
Defined benefit plan liabilities	46,441	46,441		45,862
Deferred tax liabilities	22,312	22,312		27,785
Deferred revenue	12,727	12,727		8,012
Asset retirement obligations liability	5,418	5,418		4,934
Other long-term liabilities	4,351	4,351		2,188
Total other long-term liabilities	$ 215,838	$ 215,838		$ 165,881
Euro
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity method investments | €						€ 3.0
United States of America, Dollars
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Equity method investments					$ 3,400