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Stockholders' Equity - Share Repurchase Program (Details) - Common stock: - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Share Repurchase Program [Line Items]
Total number of shares repurchased (in shares)	1,216	1,387	2,506	1,889
Average price paid per share (in dollars per share)	$ 245.57	$ 223.10	$ 236.11	$ 234.78
Amount repurchased	$ 299	$ 309	$ 592	$ 443

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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