Debt - Schedule of Debt Issuances (Details) € in Millions, $ in Millions	Sep. 30, 2023 USD ($)	Sep. 30, 2023 EUR (€)	Sep. 30, 2022 USD ($)
4.693% Notes due February 13, 2028
Debt Instrument [Line Items]
Interest rate	4.693%	4.693%
Debt instrument, face amount	$ 800
0.000% Notes due August 13, 2023
Debt Instrument [Line Items]
Interest rate	0.00%	0.00%
4.298% Notes due August 22, 2032
Debt Instrument [Line Items]
Interest rate	4.298%	4.298%
Debt instrument, face amount			$ 500
3.553% Notes due September 13, 2029
Debt Instrument [Line Items]
Interest rate	3.553%	3.553%
3.553% Notes due September 13, 2029 | Euro Member Countries, Euro
Debt Instrument [Line Items]
Debt instrument, face amount | €		€ 800
3.553% Notes due September 13, 2029 | United States of America, Dollars
Debt Instrument [Line Items]
Debt instrument, face amount	$ 868