Long-Term Debt and Available Credit Facilities Available Committed Credit Facilities (Narrative) (Details) $ in Millions	1 Months Ended		12 Months Ended	13 Months Ended	36 Months Ended		60 Months Ended
	May 31, 2023 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2025 USD ($)	Feb. 26, 2024	Jun. 03, 2027	May 03, 2025	Jun. 03, 2029	May 03, 2027	Feb. 20, 2026 USD ($)	Feb. 20, 2025 USD ($)	Feb. 20, 2024 USD ($)	Jul. 20, 2023 USD ($)	Jan. 20, 2023 USD ($)	May 03, 2022 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 5,500
Line of Credit Facility, Remaining Borrowing Capacity			5,500
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]				Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]				Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Revolving Credit Facilities due 2027
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			1,900											$ 3,000
Line of Credit Facility, Remaining Borrowing Capacity			1,900
Debt Instrument, Term					3 years			5 years
364-day Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			750
Line of Credit Facility, Remaining Borrowing Capacity			$ 750
Debt Instrument, Term				364 days
Ratio of Indebtedness to Net Capital			0.60
Adjusted Term SOFR				0.10%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Ratio of Indebtedness to Net Capital			0.60
Adjusted Term SOFR			0.10%
Revolving Credit Facilities due 2029
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 2,850
Line of Credit Facility, Remaining Borrowing Capacity			$ 2,850
Debt Instrument, Term							5 years
Revolving Credit Facilities due 2025
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity														$ 2,000
Debt Instrument, Term						3 years
364-day Revolving Credit Facilities due 2024
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity												$ 500	$ 1,000
Proceeds from Lines of Credit		$ 1,000
Repayments of Lines of Credit	$ 1,000
364-day Revolving Credit Facilities due 2026
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity										$ 750
364-day Revolving Credit Facilities due 2027
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity									$ 1,250
364-day Revolving Credit Facilities due 2025
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity											$ 1,000