Pensions and Other Postretirement Benefits - Benefit Assumptions (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Return on assets in plans	8.00%
Funded Plan \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.97%	2.67%	3.38%
Future salary increases	4.44%	4.21%	4.21%
Funded Plan \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.72%	2.27%	3.13%
Unfunded Plan \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Future salary increases	4.44%	4.21%	4.21%
Discount rate - service cost	3.14%	3.71%	4.55%
Discount rate - interest cost	1.95%	2.92%	3.99%
Return on assets in plans	8.00%	8.25%	8.25%
Unfunded Plan \| Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate - service cost	2.71%	3.41%	4.39%
Discount rate - interest cost	1.57%	2.69%	3.83%
Return on assets in plans	7.75%	8.00%	8.00%
Health care trend rate	6.00%	6.25%	6.50%

Defined Benefit Plan Assumed Health Care Cost Trend Rate

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- Definition

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate For Interest Cost

+ References

No definition available.

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- Definition

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate For Service Cost

+ References

No definition available.

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- Definition

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

+ References

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(3)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2919-114920

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- Definition

Weighted average rate of compensation increase used to determine net periodic benefit cost of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

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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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