Acquisitions (Details) - USD ($) $ in Millions	Dec. 31, 2024	Mar. 31, 2025	Sep. 30, 2024
Business Acquisition [Line Items]
Goodwill		$ 19,641	$ 18,941
Featurespace Limited
Business Acquisition [Line Items]
Total consideration	$ 946
Amount allocated to technology, intangible assets, other net assets acquired and deferred tax liabilities	152
Goodwill	$ 794