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Stock Repurchases - Narrative (Details) - Stock Repurchase Program 2011 - shares	235 Months Ended
	Apr. 30, 2021	Oct. 31, 2021	Sep. 22, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock repurchase program additional number of shares authorized approved (in shares)			80,000,000
Stock repurchased (in shares)	114,549,198
Number of shares available for repurchase under stock repurchase program (in shares)		81,450,802
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for repurchase (in shares)			196,000,000

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- Definition

The number additional shares approved under company's stock repurchase program by the entity's board of directors.

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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- Definition

The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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- Definition

Number of shares that have been repurchased and retired during the period.

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-Topic 210
-SubTopic 10
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