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Equity and Redeemable Noncontrolling Interest - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016	Jul. 01, 2017	Jun. 25, 2016
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
Other comprehensive loss before reclassifications			$ 44,305
Amounts reclassified from accumulated other comprehensive income (loss)			1,755
Net current period other comprehensive income			46,060
Income tax expense	$ 397	$ 142	623	$ 284
Foreign Currency Translation Adjustment and Other
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(154,595)
Other comprehensive loss before reclassifications			44,305
Amounts reclassified from accumulated other comprehensive income (loss)			0
Net current period other comprehensive income			44,305
Income tax expense			0
July 1, 2017	(110,290)		(110,290)
Pension and Other Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(99,169)
Other comprehensive loss before reclassifications			0
Amounts reclassified from accumulated other comprehensive income (loss)			1,755
Net current period other comprehensive income			1,755
Income tax expense	400	$ 100	623	$ 300
July 1, 2017	(98,037)		(98,037)
Total
Accumulated Other Comprehensive Income (Loss), before Tax [Roll Forward]
December 31, 2016			(253,764)
July 1, 2017	$ (208,327)		$ (208,327)