LEASES - RIGHT OF USE ASSETS (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Right of use assets
Total finance lease right of use asset	$ 28.4	$ 29.4
Two Creeks
Right of use assets
Under finance lease	13.3	10.8
Accumulated amortization	(0.6)	(0.3)
Total finance lease right of use asset	12.7	10.5
Badger Hollow I
Right of use assets
Under finance lease	16.6	19.5
Accumulated amortization	(0.9)	(0.6)
Total finance lease right of use asset	$ 15.7	$ 18.9