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Pensions and Other Postretirement Benefits - Pension Plan Weighted-Average Asset Allocations, By Asset Category (Details) - Pension Benefits	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	100.00%	100.00%
Domestic equity securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	52.00%	52.00%
Debt securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	24.00%	22.00%
International equity securities
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	23.00%	24.00%
Cash and cash equivalents
Defined Benefit Plan, Information about Plan Assets [Abstract]
Actual plan asset allocations	1.00%	2.00%

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

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