SUPPLEMENTAL EQUITY INFORMATION - AOCI (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018	Dec. 30, 2018
Changes in stockholders' equity
Balance at the beginning of the period	$ (604,289)
Other comprehensive income (loss) before reclassifications	17,745
Amounts reclassified from AOCL	4,807
Other comprehensive income (loss)	22,552	$ 5,550
Balance at the end of the period	(581,737)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Retirement benefit expense	10,727	2,778
Retained earnings	1,996,065		$ 1,954,132
Net of tax	41,956	38,941
Minimum Pension and Post-Retirement Liability
Changes in stockholders' equity
Balance at the beginning of the period	(595,820)
Other comprehensive income (loss) before reclassifications	17,745
Amounts reclassified from AOCL	4,807
Other comprehensive income (loss)	22,552
Balance at the end of the period	(573,268)
Minimum Pension and Post-Retirement Liability | Amount Reclassified from AOCI
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Retirement benefit expense	4,807	$ 5,550
Other Comprehensive Loss Related to Equity Investments
Changes in stockholders' equity
Balance at the beginning of the period	(8,469)
Balance at the end of the period	$ (8,469)