Shareholders' Equity (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other		$ (38,008)	$ 54,893	$ (139,846)	$ 225,270
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		0	1,357	0	4,639
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net		234	(2,093)	693	(2,543)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		(389)	(492)	(1,284)	(1,403)
Net change in accumulated other comprehensive income (loss)		(37,242)	53,445	(158,168)	224,378
Other comprehensive income before reclassifications [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other	[1]	(37,858)	57,930	(137,661)	227,767
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		0	1,357	0	4,639
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net		0	(2,223)	0	(2,870)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		0	51	0	94
Other comprehensive income before reclassifications [Member] | Intra-entity foreign currency transactions [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other		(14,266)	(11,193)	508	(50,512)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Changes In Components Of OCI [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment and Other		(7)	(4,241)	(130)	(6,888)
Other Comprehensive Income (Loss) Unrealized gain (loss) on investment securities, net		0	0	0	0
Other Comprehensive Income, Unrealized Gain on Derivatives Arising During Period, Net		234	130	693	327
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		(389)	(543)	(1,284)	(1,497)
Cumulative impact of newly adopted accounting standard updates [Member]
Changes In Components Of OCI [Line Items]
Reclassification to retained earnings	[2]	$ 0	$ 0	$ (22,354)	$ 0

[1] Includes intra-entity foreign currency transactions that are of a long-term investment nature of $(14,266) and $508 for the third quarter and first nine months of 2018 and $(11,193) and $(50,512) for the third quarter and first nine months of 2017, respectively.

[2] Amounts relate to unrealized gains and losses on investments and stranded tax effects reclassified from "Accumulated other comprehensive income" to "Retained earnings" in accordance with ASU No. 2018-02 and ASU No. 2016-01 (Note B).