Postretirement Benefit Plans (Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Pension
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block
2018	$ 30
2019	30
2020	31
2021	32
2022	33
Years 2022-2026	166
Other Benefits
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block
2018	3
2019	3
2020	3
2021	3
2022	3
Years 2022-2026	$ 11

Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

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

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in third fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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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.

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