Accumulated Other Comprehensive Loss (Notes)

3 Months Ended

Mar. 31, 2023

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss, net of tax, is comprised of the following:

	Pension Plan Adjustments		Other Post Retirement Employee Benefit Plan Adjustments		Total
Balance at December 31, 2021	$	(42.8)	$	0.3	$	(42.6)
Amounts reclassified from accumulated other comprehensive loss	1.1		—		1.1
Balance at March 31, 2022	$	(41.7)	$	0.3	$	(41.4)
Balance at December 31, 2022	$	(46.5)	$	13.3	$	(33.3)
Amounts reclassified from accumulated other comprehensive loss	—		(0.1)		(0.1)
Balance at March 31, 2023	$	(46.5)	$	13.2	$	(33.4)