Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) - Forward Contracts - USD ($) $ in Thousands	Mar. 28, 2020	Sep. 30, 2019
Not Designated as Hedging Instrument
Notional amount	$ 426,676	$ 498,355
Not Designated as Hedging Instrument | Canadian / U.S. Dollar
Notional amount	5,781	9,408
Not Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amount	304,482	308,282
Not Designated as Hedging Instrument | British Pound / U.S. Dollar
Notional amount	6,713	3,756
Not Designated as Hedging Instrument | Israeli Sheqel / U.S. Dollar
Notional amount	8,350	10,272
Not Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amount	18,935	37,462
Not Designated as Hedging Instrument | Swiss Franc / U.S. Dollar
Notional amount	13,986	12,001
Not Designated as Hedging Instrument | Danish Kroner/ U.S. Dollar
Notional amount	3,877	0
Not Designated as Hedging Instrument | Swedish Kronor / U.S. Dollar
Notional amount	6,873	20,636
Not Designated as Hedging Instrument | Singapore Dollar / U.S. Dollar
Notional amount	41,190	34,585
Not Designated as Hedging Instrument | Chinese Renminbi / U.S. Dollar
Notional amount	5,692	52,466
Not Designated as Hedging Instrument | Russian Ruble / U.S. Dollar
Notional amount	6,876	0
Not Designated as Hedging Instrument | All other
Notional amount	3,921	9,487
Net Investment Hedging | Designated as Hedging Instrument
Notional amount	182,095	183,396
Net Investment Hedging | Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amount	$ 182,095	$ 183,396