Restructuring, Integration, and Other Charges - Accrual (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 19,183	$ 24,416	$ 40,354	$ 39,921
Restructuring Reserve	31,107		31,107
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	16,815		16,815
Restructuring Reserve Scheduled Severance Payments Current Year	11,087		11,087
Restructuring Reserve Scheduled Severance Payments Year One	4,268		4,268
Restructuring Reserve Scheduled Severance Payments Year Two	1,402		1,402
Restructuring Reserve Scheduled Severance Payments Year Three	58		58
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	13,948		13,948
Restructuring Reserve Scheduled Lease Payments Current Year	3,911		3,911
Restructuring Reserve Scheduled Lease Payments Year One	2,780		2,780
Restructuring Reserve Scheduled Lease Payments Year Two	2,185		2,185
Restructuring Reserve Scheduled Lease Payments Year Three	1,367		1,367
Restructuring Reserve Scheduled Lease Payments Year Four	1,068		1,068
Restructuring Reserve Scheduled Lease Payments Thereafter	2,637		2,637
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve	$ 344		$ 344
Number of Years for the Other Accrual to Be Spent	1		1
Restructuring Charge 2018 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 8,798	14,263	$ 20,230	22,246
Payments for Restructuring			(9,430)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(240)
Restructuring Reserve	10,560		10,560
Restructuring Charge 2018 Plan [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges			10,496
Payments for Restructuring			(7,592)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(85)
Restructuring Reserve	2,819		2,819
Restructuring Charge 2018 Plan [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges			9,560
Payments for Restructuring			(1,820)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(151)
Restructuring Reserve	7,589		7,589
Restructuring Charge 2018 Plan [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges			174
Payments for Restructuring			(18)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(4)
Restructuring Reserve	152		152
Restructuring Charge 2017 Plan [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			20,250
Payments for Restructuring			(12,065)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(200)
Restructuring Reserve, Accrual Adjustment			3,568
Restructuring Reserve	11,553		11,553
Restructuring Charge 2017 Plan [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			15,276
Payments for Restructuring			(10,106)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(67)
Restructuring Reserve, Accrual Adjustment			1,308
Restructuring Reserve	6,411		6,411
Restructuring Charge 2017 Plan [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			4,874
Payments for Restructuring			(1,934)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(129)
Restructuring Reserve, Accrual Adjustment			2,267
Restructuring Reserve	5,078		5,078
Restructuring Charge 2017 Plan [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve			100
Payments for Restructuring			(25)
Restructuring Reserve, Foreign Currency Translation Gain (Loss)			(4)
Restructuring Reserve, Accrual Adjustment			(7)
Restructuring Reserve	64		64
Restructuring Charges From Prior to 2017 [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Accrual Adjustment			712
Restructuring Reserve	8,994		8,994
Restructuring Charges From Prior to 2017 [Member] | Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Accrual Adjustment			(91)
Restructuring Reserve	7,585		7,585
Restructuring Charges From Prior to 2017 [Member] | Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Accrual Adjustment			818
Restructuring Reserve	1,281		1,281
Restructuring Charges From Prior to 2017 [Member] | Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Reserve, Accrual Adjustment			(15)
Restructuring Reserve	128		128
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	7,454	6,157	15,844	11,577
Restructuring Charges From Prior Periods [Member]
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 2,931	$ 3,996	$ 4,280	$ 6,098