Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 8,156	$ 8,775
Less: Current maturities	546	516
Long-term debt	7,610	8,259
Notes Payable | 2.625% notes due February 2023
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 500
Notes interest rate, percentage	2.625%	2.625%
Notes Payable | 0.375% euro notes due May 2024
Debt Instrument [Line Items]
Long-term debt	$ 529	$ 490
Notes interest rate, percentage	0.375%
Notes Payable | 3.15% notes due June 2025
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Notes interest rate, percentage	3.15%
Notes Payable | 1.25% euro notes due October 2025
Debt Instrument [Line Items]
Long-term debt	$ 529	490
Notes interest rate, percentage	1.25%
Notes Payable | 0.875% notes due October 2026
Debt Instrument [Line Items]
Long-term debt	$ 750	750
Notes interest rate, percentage	0.875%
Notes Payable | 1.8% notes due October 2027
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Notes interest rate, percentage	1.80%
Notes Payable | 2.0% notes due December 2028
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,000
Notes interest rate, percentage	2.00%		2.00%
Notes Payable | 2.0% euro notes due October 2029
Debt Instrument [Line Items]
Long-term debt	$ 529	490
Notes interest rate, percentage	2.00%
Notes Payable | 1.95% notes due October 2030
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Notes interest rate, percentage	1.95%
Notes Payable | 2.20% notes due December 2031
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,000
Notes interest rate, percentage	2.20%		2.20%
Notes Payable | 6.0% notes due August 2032
Debt Instrument [Line Items]
Long-term debt	$ 250	250
Notes interest rate, percentage	6.00%
Notes Payable | 6.125% notes due April 2039
Debt Instrument [Line Items]
Long-term debt	$ 250	250
Notes interest rate, percentage	6.125%
Notes Payable | 5.25% notes due November 2039
Debt Instrument [Line Items]
Long-term debt	$ 300	300
Notes interest rate, percentage	5.25%
Notes Payable | 2.75% notes due October 2050
Debt Instrument [Line Items]
Long-term debt	$ 500	500
Notes interest rate, percentage	2.75%
Notes Payable | 2.80% notes due December 2051
Debt Instrument [Line Items]
Long-term debt	$ 1,000	1,000
Notes interest rate, percentage	2.80%		2.80%
Notes Payable | Other
Debt Instrument [Line Items]
Long-term debt	$ 19	$ 255