LEASES - Deferred payment (Details) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Fixed operating lease deferred amounts included in:
Fixed operating lease deferred amounts, Beginning	$ 299.3
Fixed operating lease deferred amounts, Activity	(90.5)
Fixed operating lease deferred amounts, Ending	208.8
Finance lease deferred amounts included in:
Finance lease deferred amounts, Beginning	2.4
Finance lease deferred amounts, Activity	(1.2)
Finance lease deferred amounts, Ending	1.2
Variable lease deferred amounts included in:
Variable lease deferred amounts, Beginning	13.4
Variable lease deferred amounts, Activity	(4.5)
Variable lease deferred amounts, Ending	8.9
Total deferred lease amounts, Beginning	315.1
Total deferred lease amounts, Activity	(96.2)
Total deferred lease amounts, Ending	218.9
Fixed operating lease deferred amounts	$ 79.4