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Accumulated Other Comprehensive Income (Loss) (Income (Expense) Effect of Reclassifications) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Affected Line Item on the Statements of Income      
Interest Expense, Operating and Nonoperating $ (808) $ (738) $ (666)
Other Income (Expense) - net 151 114 (40)
Total Pre-tax 1,472 1,116 924
Income Taxes (291) (228) (184)
Amounts Reclassified From Accumulated Other Comprehensive Income [Member]      
Affected Line Item on the Statements of Income      
Total After-Tax (2) 0 (1)
Amounts Reclassified From Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member]      
Affected Line Item on the Statements of Income      
Total Pre-tax 1 3 1
Income Taxes (1) 0 1
Total After-Tax 0 3 2
Amounts Reclassified From Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
Affected Line Item on the Statements of Income      
Total Pre-tax (3) (3) (3)
Income Taxes 1 0 0
Total After-Tax (2) (3) (3)
Interest Rate Swaps [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent      
Affected Line Item on the Statements of Income      
Interest Expense, Operating and Nonoperating (3) (3) (3)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent | Amounts Reclassified From Accumulated Other Comprehensive Income [Member] | Defined Benefit Plans [Member]      
Affected Line Item on the Statements of Income      
Total Pre-tax 2 4 3
Defined Benefit Plans [Member] | Prior Service Costs [Member] | Amounts Reclassified From Accumulated Other Comprehensive Income [Member]      
Affected Line Item on the Statements of Income      
Total Pre-tax $ (1) $ (1) $ (2)