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Retirement Plans - Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Net actuarial (gain) loss	$ (1.7)	$ 3.2
Prior service cost (credit)	1.2	1.0
Accumulated other comprehensive (income) loss, before taxes	(0.5)	4.2
Accumulated other comprehensive (income) loss, after taxes	(0.4)	3.2
Pensions
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Net actuarial (gain) loss	(1.6)	3.1
Prior service cost (credit)	1.3	1.0
Accumulated other comprehensive (income) loss, before taxes	(0.3)	4.1
Accumulated other comprehensive (income) loss, after taxes	(0.2)	3.1
Other Benefits
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss)
Net actuarial (gain) loss	(0.1)	0.1
Prior service cost (credit)	(0.1)	0.0
Accumulated other comprehensive (income) loss, before taxes	(0.2)	0.1
Accumulated other comprehensive (income) loss, after taxes	$ (0.2)	$ 0.1

X

- Definition

Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (j)
-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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-Publisher FASB
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- Definition

Amount, before tax, of accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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-URI https://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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