OTHER COMPREHENSIVE INCOME (Changes in Accumulated Other Comprehensive Income, Net of Tax) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Beginning balance			$ (152.7)
Amounts reclassified from AOCI			2.2
Net current period OCI changes	$ 1.1	$ 1.6	2.2	$ 3.2
AOCI, Ending balance	(150.5)	$ (178.1)	(150.5)	$ (178.1)
Amortization Of Cash Flow Hedge Losses [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Beginning balance			(22.5)
Amounts reclassified from AOCI			0.7
Net current period OCI changes			0.7
AOCI, Ending balance	(21.8)		(21.8)
Amortization Of Pension And Postretirement Plan Actuarial Loss And Prior Service Cost [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI, Beginning balance			(130.2)
Amounts reclassified from AOCI			1.5
Net current period OCI changes			1.5
AOCI, Ending balance	$ (128.7)		$ (128.7)