STATEMENTS OF CONSOLIDATED COMPREHENSIVE (LOSS) INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (13.8)	$ (22.4)	$ (5.7)	$ (17.9)
Other comprehensive income (loss), net of tax
Defined benefit pension plan and Salaried VEBA	0.9	0.7	1.8	1.4
Cash flow hedges	(36.5)	15.2	(19.4)	23.7
Foreign currency translation				(0.1)
Other comprehensive (loss) income, net of tax	(35.6)	15.9	(17.6)	25.0
Comprehensive (loss) income	$ (49.4)	$ (6.5)	$ (23.3)	$ 7.1

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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