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Stock Repurchases (Details) - shares	3 Months Ended		157 Months Ended
	Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2024	Sep. 22, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for repurchase (in shares)				784,000,000
Stock Repurchase Program 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program additional number of shares authorized approved (in shares)				320,000,000
Stock repurchased (in shares)	0	0	458,000,000
Number of shares available for repurchase under stock repurchase program (in shares)	326,000,000		326,000,000

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