Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Sep. 29, 2019	Sep. 30, 2018
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,910,641	$ 1,797,611	$ 1,773,949	$ 2,161,526	$ 1,995,949	$ 1,844,277	$ 1,773,949	$ 1,844,277
Total other comprehensive income, net of tax	(1,293)	7,090	7,633	10,312	9,840	93,445	13,430	113,597
Ending balance	1,836,219	1,910,641	1,797,611	2,152,972	2,161,526	1,995,949	1,836,219	2,152,972
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(614,961)	(622,051)	(629,684)	(396,764)	(406,604)	(500,049)	(629,684)	(500,049)
Other comprehensive (loss) income before reclassifications	(3,039)			3,014			1,105	105,709
Income tax benefit (expense)	(2,793)			(1,355)			(1,274)	(30,073)
Net other comprehensive income (loss) before reclassifications	(5,832)			1,659			(169)	75,636
Total reclassifications before tax	5,908			11,296			17,723	49,588
Income tax benefit (expense)	(1,369)			(2,643)			(4,124)	(11,627)
Net reclassifications	4,539			8,653			13,599	37,961
Total other comprehensive income, net of tax	(1,293)	7,090	7,633	10,312	9,840	93,445	13,430	113,597
Ending balance	(616,254)	(614,961)	(622,051)	(386,452)	(396,764)	(406,604)	(616,254)	(386,452)
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(38,007)		(49,608)	(41,419)		(21,852)	(49,608)	(21,852)
Other comprehensive (loss) income before reclassifications	(15,451)			(2,037)			(3,693)	(21,604)
Income tax benefit (expense)	130			(175)			(27)	(175)
Net other comprehensive income (loss) before reclassifications	(15,321)			(2,212)			(3,720)	(21,779)
Total reclassifications before tax	0			0			0	0
Income tax benefit (expense)	0			0			0	0
Net reclassifications	0			0			0	0
Total other comprehensive income, net of tax	(15,321)			(2,212)			(3,720)	(21,779)
Ending balance	(53,328)	(38,007)		(43,631)	(41,419)		(53,328)	(43,631)
Derivative financial instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(10,579)		1,785	7,431		(17,254)	1,785	(17,254)
Other comprehensive (loss) income before reclassifications	12,412			5,051			4,798	30,939
Income tax benefit (expense)	(2,923)			(1,180)			(1,247)	(7,269)
Net other comprehensive income (loss) before reclassifications	9,489			3,871			3,551	23,670
Total reclassifications before tax	(4,211)			(4,911)			(12,634)	1,467
Income tax benefit (expense)	1,006			1,163			3,003	(329)
Net reclassifications	(3,205)			(3,748)			(9,631)	1,138
Total other comprehensive income, net of tax	6,284			123			(6,080)	24,808
Ending balance	(4,295)	(10,579)		7,554	7,431		(4,295)	7,554
Pension and postretirement benefit plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(566,375)		$ (581,861)	(362,776)		$ (460,943)	(581,861)	(460,943)
Other comprehensive (loss) income before reclassifications	0			0			0	96,374
Income tax benefit (expense)	0			0			0	(22,629)
Net other comprehensive income (loss) before reclassifications	0			0			0	73,745
Total reclassifications before tax	10,119			16,207			30,357	48,121
Income tax benefit (expense)	(2,375)			(3,806)			(7,127)	(11,298)
Net reclassifications	7,744			12,401			23,230	36,823
Total other comprehensive income, net of tax	7,744			12,401			23,230	110,568
Ending balance	(558,631)	$ (566,375)		(350,375)	$ (362,776)		(558,631)	(350,375)
Pension and postretirement benefit plans - Prior service credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	(1,078)			(565)			(3,234)	(1,696)
Pension and postretirement benefit plans - Actuarial losses
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total reclassifications before tax	$ 11,197			$ 16,772			$ 33,591	$ 49,817