Benefit Plans, Amounts Recognized in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Amount recognized end of year	$ 34.4	$ 69.6
Accumulated benefit obligation	297.4	408.7
Pension Benefits [Member]
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net actuarial (gain) loss	38.0	73.2
Prior service cost	0.1	0.1
Amount recognized end of year	38.1	73.3
Post-Retirement Benefits [Member]
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net actuarial (gain) loss	(3.8)	(3.7)
Prior service cost	0.0	0.0
Amount recognized end of year	$ (3.8)	$ (3.7)

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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-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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- Definition

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

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- Definition

Amount, after 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
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- Definition

Amount, after 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
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-Paragraph 1
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