Derivative Financial Instruments (Notional Amounts Of Outstanding Forward Contracts) (Details) - Forward Contracts - USD ($) $ in Thousands	Dec. 28, 2019	Sep. 30, 2019
Not Designated as Hedging Instrument
Notional amount	$ 415,355	$ 498,355
Not Designated as Hedging Instrument | Canadian / U.S. Dollar
Notional amount	7,962	9,408
Not Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amount	273,748	308,282
Not Designated as Hedging Instrument | British Pound / U.S. Dollar
Notional amount	4,344	3,756
Not Designated as Hedging Instrument | Israeli Sheqel / U.S. Dollar
Notional amount	7,824	10,272
Not Designated as Hedging Instrument | Japanese Yen / U.S. Dollar
Notional amount	34,103	37,462
Not Designated as Hedging Instrument | Swiss Franc / U.S. Dollar
Notional amount	8,116	12,001
Not Designated as Hedging Instrument | Swedish Kronor / U.S. Dollar
Notional amount	4,837	20,636
Not Designated as Hedging Instrument | Chinese Yuan offshore / U.S. Dollar
Notional amount	1,238	43,387
Not Designated as Hedging Instrument | Singapore Dollar / U.S. Dollar
Notional amount	44,617	34,585
Not Designated as Hedging Instrument | Chinese Renminbi / U.S. Dollar
Notional amount	14,369	9,079
Not Designated as Hedging Instrument | Russian Ruble / U.S. Dollar
Notional amount	6,360	0
Not Designated as Hedging Instrument | All other
Notional amount	7,837	9,487
Net Investment Hedging | Designated as Hedging Instrument
Notional amount	151,595	183,396
Net Investment Hedging | Designated as Hedging Instrument | Euro / U.S. Dollar
Notional amount	$ 151,595	$ 183,396