Borrowings - Narrative (Details) - USD ($)	1 Months Ended	6 Months Ended
	Apr. 30, 2025	Apr. 30, 2025	Oct. 31, 2024
Line of Credit Facility [Line Items]
Outstanding Gross Notional	$ 20,910,000,000	$ 20,910,000,000	$ 20,253,000,000
Commercial Paper
Line of Credit Facility [Line Items]
Maximum borrowing capacity under credit facility	6,000,000,000	6,000,000,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity under credit facility	5,000,000,000	5,000,000,000
Credit Facilities
Line of Credit Facility [Line Items]
Available borrowing resources	1,100,000,000	1,100,000,000
Forward Contracts
Line of Credit Facility [Line Items]
Outstanding Gross Notional	825,000,000	825,000,000
U.S. Dollar Global Notes , Due April 2030 And 2035 | Senior Notes
Line of Credit Facility [Line Items]
Face amount of debt instrument	1,000,000,000	1,000,000,000
U.S. Dollar Global Notes , Due April 2030
Line of Credit Facility [Line Items]
Face amount of debt instrument	$ 500,000,000	$ 500,000,000
Interest rate (percent)	5.40%	5.40%
U.S. Dollar Global Notes , Due April 2030 | Senior Notes
Line of Credit Facility [Line Items]
Face amount of debt instrument	$ 500,000,000	$ 500,000,000
Interest rate (percent)	5.40%	5.40%
U.S. Dollar Global Notes , Due April 2035
Line of Credit Facility [Line Items]
Face amount of debt instrument	$ 500,000,000	$ 500,000,000
Interest rate (percent)	6.10%	6.10%
U.S. Dollar Global Notes , Due April 2035 | Senior Notes
Line of Credit Facility [Line Items]
Face amount of debt instrument	$ 500,000,000	$ 500,000,000
Interest rate (percent)	6.10%	6.10%
U.S. Dollar Global Notes , Due April And Oct 2025 | Senior Notes
Line of Credit Facility [Line Items]
Issuance costs	$ 9,000,000
New Revolving Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Revolving credit facility, term		5 years