STOCKHOLDERS' EQUITY (Schedule of Changes in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	$ 1,855,661	$ 2,086,132	$ 2,659,875
Granite-Holdings Sarl common-control transaction		203,209
Other comprehensive income (loss) before reclassifications	(97,094)	95,590
Amounts reclassified from accumulated other comprehensive loss to net income	412	(81)
Impact of currency translation	(12)
Total other comprehensive income (loss), net of tax	(96,694)	95,509	(238,385)
Balance, end of year	2,019,585	1,855,661	2,086,132
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(31,140)	(329,858)	(91,473)
Total other comprehensive income (loss), net of tax	(96,694)	95,509	(238,385)
Balance, end of year	(127,834)	(31,140)	(329,858)
Losses Related to Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	42,081	(265,714)
Granite-Holdings Sarl common-control transaction		204,577
Other comprehensive income (loss) before reclassifications	(97,851)	103,218
Amounts reclassified from accumulated other comprehensive loss to net income	0	0
Impact of currency translation	0
Total other comprehensive income (loss), net of tax	(97,851)	103,218
Balance, end of year	(55,770)	42,081	(265,714)
Unrealized Gains (Losses) on Derivative Financial Instruments Classified as Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(1,848)	99
Granite-Holdings Sarl common-control transaction		(1,368)
Other comprehensive income (loss) before reclassifications	829	60
Amounts reclassified from accumulated other comprehensive loss to net income	348	(639)
Impact of currency translation	(12)
Total other comprehensive income (loss), net of tax	1,165	(579)
Balance, end of year	(683)	(1,848)	99
Losses Related to Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	(71,434)	(64,243)
Granite-Holdings Sarl common-control transaction		0
Other comprehensive income (loss) before reclassifications	(939)	(7,770)
Amounts reclassified from accumulated other comprehensive loss to net income	910	579
Impact of currency translation	0
Total other comprehensive income (loss), net of tax	(29)	(7,191)
Balance, end of year	(71,463)	(71,434)	(64,243)
Unrealized Holding Gains on Available-for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance, beginning of year	61	0
Granite-Holdings Sarl common-control transaction		0
Other comprehensive income (loss) before reclassifications	867	82
Amounts reclassified from accumulated other comprehensive loss to net income	(846)	(21)
Impact of currency translation	0
Total other comprehensive income (loss), net of tax	21	61
Balance, end of year	$ 82	$ 61	$ 0