Compensation Plans (Amounts Recognized For Share-Based Payment Transactions) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Compensation Costs of Transactions Classified as Cash-Settled	$ 7	$ 1
Total Compensation Costs of Transactions Classified as Equity-Settled	17	16
Less: Total Share-Based Compensation Costs Capitalized	(6)	(4)
Total Share-Based Compensation Expense (Recovery)	18	13
Operating Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Share-Based Compensation Expense (Recovery)	6	3
Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total Share-Based Compensation Expense (Recovery)	$ 12	$ 10

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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+ Details