Debt (Narrative) (Details) - USD ($)	1 Months Ended		9 Months Ended
	Oct. 31, 2023	Nov. 30, 2022	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Oct. 31, 2022
Debt Instrument [Line Items]
Commercial paper outstanding			$ 0		$ 0
Debt, weighted average interest rate			5.50%
Other Debt Facilities
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding			$ 0		0
Other credit and overdraft facilities			112,000,000
Letters of credit			$ 131,000,000
4.05% Senior Debt Obligations October 2023 | Subsequent Event
Debt Instrument [Line Items]
Interest rate	4.05%
Senior notes – 5.400% due 2033
Debt Instrument [Line Items]
Interest rate			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 – 5.750% due 2032
Debt Instrument [Line Items]
Interest rate			5.75%			5.75%
Senior notes – 6.25% due 2052
Debt Instrument [Line Items]
Interest rate			6.25%			6.25%
3.30% Senior Debt Obligations Due March 2023
Debt Instrument [Line Items]
Interest rate		3.30%
Commercial paper
Debt Instrument [Line Items]
Short-term debt			$ 2,800,000,000			$ 2,000,000,000
Revolving credit facility | Subsequent Event
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity	$ 3,500,000,000
Revolving credit facility | New Facility
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding			0
Revolving credit facility | New Facility | Subsequent Event
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity	$ 2,800,000,000
Debt instrument, term	5 years
Revolving credit facility | Uncommitted Credit Facility
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding			200,000,000
Revolving credit facility | Uncommitted Credit Facility | Subsequent Event
Debt Instrument [Line Items]
Revolving credit facility, borrowing capacity	$ 200,000,000
Debt instrument, term	1 year
Revolving credit facility | Old Facility
Debt Instrument [Line Items]
Revolving credit facility, amount outstanding			0		$ 0
Senior Notes | 4.05% Senior Debt Obligations October 2023 | Subsequent Event
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
Senior Notes | Senior notes – 5.750% due 2032
Debt Instrument [Line Items]
Debt instrument face amount						500,000,000
Senior Notes | Senior notes – 6.25% due 2052
Debt Instrument [Line Items]
Debt instrument face amount						$ 500,000,000
Senior Notes | 3.30% Senior Debt Obligations Due March 2023
Debt Instrument [Line Items]
Repayments of debt		$ 350,000,000