Defined Benefit Plan, Average Remaining Service Period

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- Definition

Amount, after tax, of accumulated increase (decrease) in equity from transaction and other event and circumstance from nonowner source.

+ References

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-Name Accounting Standards Codification
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-8

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

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- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

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- Definition

Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

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- Definition

Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(7)
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

+ Details

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- Definition

Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Postretirement Health Care and Life Insurance Benefits Details - Textual (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 138.8	$ 189.6
Defined Benefit Plan, Equity Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation strategy for the Non-Represented trust		30.00%
Fixed Income Securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Asset allocation strategy for the Non-Represented trust		70.00%
Postretirement Health Care and Life Insurance Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment		$ 6.5	$ 0.0
Expected long-term return on plan assets	5.95%	5.75%	5.75%	5.75%
Accumulated postretirement benefit obligation at end of period		$ 145.4	$ 178.0	$ 189.9
Defined benefit plan, expected amortization of prior service cost (credit), next fiscal year		$ 40.8
Postretirement Health Care and Life Insurance Benefits \| Retirement Plan December 2024 Amendment [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Average remaining service period (in years)		12 years 8 months 12 days
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 6.5
Postretirement Health Care and Life Insurance Benefits \| Retirement Plan October 2021 Amendment [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Average remaining service period (in years)		11 years	12 years
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 107.6
Postretirement Health Care and Life Insurance Benefits \| Retirement Plan Amendment Two
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Average remaining service period (in years)		6 years 6 months	7 years 6 months
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 6.7
Postretirement Health Care and Life Insurance Benefits \| Retirement Plan Amendment One
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Average remaining service period (in years)		10 months 24 days	1 year 10 months 24 days
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 29.4
Postretirement Health Care and Life Insurance Benefits \| Retirement Plan 2018 Amendment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Average remaining service period (in years)			10 months 24 days