PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS - Narrative (Details) - USD ($)		3 Months Ended		6 Months Ended
	Mar. 27, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Defined Benefit Plan Disclosure [Line Items]
Gain (loss) on sale mark to market adjustments		$ 0	$ 900,000	$ 0	$ 1,300,000
Company contributions		600,000	$ 1,400,000	1,100,000	$ 2,800,000
Additional expected benefit payment		46,000,000		46,000,000
Deferred contribution payments	$ 5,500,000
2018 Plan
Defined Benefit Plan Disclosure [Line Items]
Additional expected benefit payment		1,100,000		1,100,000
2019 Plan
Defined Benefit Plan Disclosure [Line Items]
Additional expected benefit payment		23,700,000		23,700,000
2020 Plan
Defined Benefit Plan Disclosure [Line Items]
Additional expected benefit payment		16,500,000		16,500,000
Pension Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Additional expected benefit payment		25,000,000		25,000,000
Other Plans
Defined Benefit Plan Disclosure [Line Items]
Additional expected benefit payment		$ 4,500,000		$ 4,500,000