Short-Term Borrowings, Long-Term Debt and Available Credit Facilities Repurchase Facility and Revolving Credit Facilities (Details) $ in Millions	9 Months Ended		12 Months Ended	37 Months Ended	61 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	May 01, 2023	May 30, 2025	May 31, 2027	May 01, 2022 USD ($)	Feb. 08, 2022 USD ($)	Dec. 31, 2021 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	$ 5,500
Line of Credit Facility, Maximum Borrowing Capacity	5,500
Proceeds from debt	1,335	$ 419
Repayments of Long-term Debt	355	1
Foreign Currency Loans
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	85
Revolving Credit Facilities due 2022
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity						$ 3,000
Debt Instrument, Term				3 years
Revolving Credit Facilities due 2024 [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Term					5 years
Revolving Credit Facilities due 2025 [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	2,000
Line of Credit Facility, Maximum Borrowing Capacity	2,000					2,000
Debt Instrument, Term				3 years
Revolving Credit Facilities due 2025 [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Adjusted Term SOFR				0.10%
Revolving Credit Facilities due 2027
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	3,000
Line of Credit Facility, Maximum Borrowing Capacity	3,000					$ 3,000
Debt Instrument, Term					5 years
Revolving Credit Facility
Line of Credit Facility [Line Items]
Ratio of Indebtedness to Net Capital						0.60
364-day Revolving Credit Facilities due 2023
Line of Credit Facility [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	500
Line of Credit Facility, Maximum Borrowing Capacity	500					$ 500
Debt Instrument, Term			364 days
Ratio of Indebtedness to Net Capital						0.60
364-day Revolving Credit Facilities due 2023 | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Adjusted Term SOFR			0.10%
Securities Sold under Agreements to Repurchase [Member]
Line of Credit Facility [Line Items]
Short-term borrowings							$ 500
Percentage of outstanding amounts borrowed utilized as collateral							105.00%
Securities Sold under Agreements to Repurchase [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Line of Credit Facility [Line Items]
Adjusted Term SOFR				0.10%
Securities Sold under Agreements to Repurchase [Member] | Repurchase Agreements [Member]
Line of Credit Facility [Line Items]
Short-term borrowings	$ 200	$ 550						$ 0