CAPITAL CONSTRUCTION FUND (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Feb. 17, 2023
Maximum period to commit fund deposits for qualified purposes	25 years
Period over which deposits will be treated as non-qualified withdrawals	5 years
Capital construction fund - cash on deposit	$ 518.2		$ 100.0
Accounts receivable, net	268.5	$ 343.7
Interest income from capital construction fund	4.9	0.0
Eligible Accounts Receivable Assigned to CCF
Accounts receivable, net	$ 9.9	$ 9.8
Amount pledged to capital construction fund			$ 200.0