Retirement Benefits Estimated Future Benefit Payments (Details 8) $ in Millions	Dec. 31, 2025 USD ($)
Estimated Benefit Payments (Table Amounts) [Abstract]
2026	$ 2,203
2027	2,247
2028	2,274
2029	2,292
2030	2,305
2031 through 2035	11,347
Pension Benefits
Estimated Benefit Payments (Table Amounts) [Abstract]
2026	2,092
2027	2,136
2028	2,164
2029	2,185
2030	2,201
2031 through 2035	10,894
Medical and Life Benefits
Estimated Benefit Payments (Table Amounts) [Abstract]
2026	111
2027	111
2028	110
2029	107
2030	104
2031 through 2035	$ 453

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: 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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