Employee Benefit Plans (Target and Actual Asset Allocations) (Details)	Dec. 31, 2023	Dec. 31, 2022
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	100.00%
Actual asset allocation	100.00%	100.00%
Master Trust \| Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	45.00%
Actual asset allocation	45.00%	49.00%
Master Trust \| Global private equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	2.00%
Actual asset allocation	2.00%	2.00%
Master Trust \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	35.00%
Actual asset allocation	35.00%	30.00%
Master Trust \| Return seeking debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	7.00%
Actual asset allocation	6.00%	7.00%
Master Trust \| Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	4.00%
Actual asset allocation	4.00%	6.00%
Master Trust \| Real estate and cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	7.00%
Actual asset allocation	8.00%	6.00%
OPEB
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	100.00%
Actual asset allocation	100.00%	100.00%
OPEB \| U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	29.00%
Actual asset allocation	30.00%	12.00%
OPEB \| Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	15.00%
Actual asset allocation	15.00%	5.00%
OPEB \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	47.00%
Actual asset allocation	30.00%	11.00%
OPEB \| Real estate
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	5.00%
Actual asset allocation	7.00%	3.00%
OPEB \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	4.00%
Actual asset allocation	18.00%	69.00%
Other Post-Retirement Benefit Plans \| Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	100.00%
Actual asset allocation	100.00%	100.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	14.00%
Actual asset allocation	14.00%	14.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Global private equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	1.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	80.00%
Actual asset allocation	79.00%	80.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Return seeking debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	2.00%
Actual asset allocation	2.00%	2.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	1.00%
Actual asset allocation	2.00%	2.00%
Other Post-Retirement Benefit Plans \| Master Trust \| Real estate and cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	2.00%
Actual asset allocation	3.00%	2.00%

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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

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
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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