OTHER ITEMS IMPACTING COMPARABILITY - Summary (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Restructuring and other, net	$ 76,364	$ 35,308	$ 5,597
ERP implementation costs	34,251	21,260	742
Goodwill impairment	0	0	15,513
Restructuring and other items, net	110,615	56,568	21,852
Gains on sale of properties	(5,418)	(18,614)	0
Early redemption of medium-term notes	8,999	0	0
ChoiceLease liability insurance revenue	(23,817)	0	0
Other items impacting comparability, net	$ 90,379	$ 37,954	$ 21,852