Pension Plan and Employee Benefits - Target Portfolio Allocations (Details) - PENSION BENEFITS	Dec. 31, 2023
≤ 80% \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	80.00%
≤ 80% \| RETURN-SEEKING
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	60.00%
≤ 80% \| LIABILITY-HEDGING CREDIT
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
≤ 80% \| LIABILITY-HEDGING GOVERNMENT
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
80% to 100% \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	80.00%
80% to 100% \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	100.00%
80% to 100% \| RETURN-SEEKING \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	47.00%
80% to 100% \| RETURN-SEEKING \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	60.00%
80% to 100% \| LIABILITY-HEDGING CREDIT \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
80% to 100% \| LIABILITY-HEDGING CREDIT \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	37.00%
80% to 100% \| LIABILITY-HEDGING GOVERNMENT \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	16.00%
80% to 100% \| LIABILITY-HEDGING GOVERNMENT \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	20.00%
100% to 115% \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	100.00%
100% to 115% \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	115.00%
100% to 115% \| RETURN-SEEKING \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	10.00%
100% to 115% \| RETURN-SEEKING \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	47.00%
100% to 115% \| LIABILITY-HEDGING CREDIT \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	37.00%
100% to 115% \| LIABILITY-HEDGING CREDIT \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	83.00%
100% to 115% \| LIABILITY-HEDGING GOVERNMENT \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	7.00%
100% to 115% \| LIABILITY-HEDGING GOVERNMENT \| Maximum
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	16.00%
≥ 115% \| Minimum
Defined Contribution Plan Disclosure [Line Items]
Thresholds for target portfolio allocations	11500.00%
≥ 115% \| RETURN-SEEKING
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	1000.00%
≥ 115% \| LIABILITY-HEDGING CREDIT
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	8300.00%
≥ 115% \| LIABILITY-HEDGING GOVERNMENT
Defined Contribution Plan Disclosure [Line Items]
Target portfolio allocations	700.00%

Defined Benefit Plan, Target Allocation Threshold, Percentage

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- Definition

Percentage of target 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/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 70
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480794/715-70-50-1

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