Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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Debt (Narrative) (Details) - USD ($)	1 Months Ended
Debt (Narrative) (Details) - USD ($)	Jun. 30, 2024	Mar. 31, 2024	Oct. 31, 2023	Feb. 29, 2024	Dec. 31, 2023	Nov. 30, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Oct. 31, 2022	Sep. 30, 2022
Debt Instrument [Line Items]
Commercial paper outstanding	$ 749,000,000				$ 0
Other Debt Facilities
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding	0				0
Other credit and overdraft facilities	118,000,000				113,000,000
Letters of credit	$ 143,000,000				139,000,000
Senior notes – 3.50% due 2024
Debt Instrument [Line Items]
Interest rate	3.50%
3.875% Senior Debt Obligations October 2024
Debt Instrument [Line Items]
Interest rate		3.875%
Senior notes – 5.150% due 2034
Debt Instrument [Line Items]
Interest rate	5.15%			5.15%
Senior notes – $5.450% due 2054
Debt Instrument [Line Items]
Interest rate	5.45%			5.45%
4.05% Senior Debt Obligations October 2023
Debt Instrument [Line Items]
Interest rate			4.05%
Senior notes – 5.400% due 2033
Debt Instrument [Line Items]
Interest rate	5.40%						5.40%
5.700% Senior Debt Obligations Due 2053
Debt Instrument [Line Items]
Interest rate							5.70%
Senior notes – 5.450% due 2053
Debt Instrument [Line Items]
Interest rate	5.45%								5.45%
Senior Notes \| Senior notes – 3.50% due 2024
Debt Instrument [Line Items]
Repayments of debt	$ 600,000,000
Senior Notes \| 3.875% Senior Debt Obligations October 2024
Debt Instrument [Line Items]
Repayments of debt		$ 1,000,000,000
Senior Notes \| Senior notes – 5.150% due 2034
Debt Instrument [Line Items]
Debt instrument face amount				$ 500,000,000
Senior Notes \| Senior notes – $5.450% due 2054
Debt Instrument [Line Items]
Debt instrument face amount				$ 500,000,000
Senior Notes \| 4.05% Senior Debt Obligations October 2023
Debt Instrument [Line Items]
Repayments of debt			$ 250,000,000
Senior Notes \| Senior notes – 5.400% due 2033
Debt Instrument [Line Items]
Debt instrument face amount							$ 600,000,000
Senior Notes \| 5.700% Senior Debt Obligations Due 2053
Debt Instrument [Line Items]
Debt instrument face amount							1,000,000,000
Senior Notes \| Senior notes – 5.450% due 2053
Debt Instrument [Line Items]
Debt instrument face amount									$ 600,000,000
Revolving credit facility
Debt Instrument [Line Items]
Debt instrument, term			5 years
Revolving credit facility, borrowing capacity			$ 3,500,000,000
Revolving credit facility \| New Facility
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity							$ 2,800,000,000
Revolving credit facility, amount outstanding	$ 0				$ 0
Revolving credit facility \| Uncommitted Credit Facility
Debt Instrument [Line Items]
Debt instrument, term			1 year
Revolving credit facility, amount outstanding								$ 200,000,000
Debt, weighted average interest rate								5.50%
Commercial paper
Debt Instrument [Line Items]
Short-term debt			$ 2,800,000,000			$ 3,500,000,000				$ 2,800,000,000	$ 2,000,000,000
Effective interest rate (percent)	5.498%