STOCKHOLDERS' EQUITY - AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	$ 1,109.6	$ 921.5
Total stockholders' equity, End of Period	1,181.2	1,109.6
CTA
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	(188.0)	(145.2)
Other comprehensive income (loss) before reclassifications	(97.1)	(42.7)
Amounts reclassified from AOCI	(0.4)	(0.1)
Net other comprehensive income (loss)	(97.5)	(42.8)
Total stockholders' equity, End of Period	(285.5)	(188.0)
Derivative Hedging Adj.
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	4.0	(6.0)
Other comprehensive income (loss) before reclassifications	(4.0)	21.3
Amounts reclassified from AOCI	(6.4)	(11.3)
Net other comprehensive income (loss)	(10.4)	10.0
Total stockholders' equity, End of Period	(6.4)	4.0
Derivative Hedging Adj. | Commodity swaps
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Amounts reclassified from AOCI	(12.1)
Reclassification from AOCI, Current Period, Tax	3.5
Debt & Equity Securities Adj.
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	0.0	1.2
Other comprehensive income (loss) before reclassifications	(3.5)	(1.2)
Amounts reclassified from AOCI	0.0	0.0
Net other comprehensive income (loss)	(3.5)	(1.2)
Total stockholders' equity, End of Period	(3.5)	0.0
Pension Liability Adj.
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	(44.5)	(58.4)
Other comprehensive income (loss) before reclassifications	(2.9)	11.9
Amounts reclassified from AOCI	1.2	2.0
Net other comprehensive income (loss)	(1.7)	13.9
Total stockholders' equity, End of Period	(46.2)	(44.5)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Total stockholders' equity, Beginning of Period	(228.5)	(208.4)
Other comprehensive income (loss) before reclassifications	(107.5)	(10.7)
Amounts reclassified from AOCI	(5.6)	(9.4)
Net other comprehensive income (loss)	(113.1)	(20.1)
Total stockholders' equity, End of Period	$ (341.6)	$ (228.5)