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Stockholders' Deficit - Narrative (Details) - USD ($) shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	May 31, 2021	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Stockholders' Equity Note [Abstract]
Repurchases of common stock (shares)		52	4	113	39
Payment in connection with repurchases of shares		$ 1,600	$ 100	$ 2,988	$ 814
Share repurchase authorization remaining		$ 9,700		$ 9,700
Subsequent event
Subsequent Event [Line Items]
Shares settled (in shares)	2

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Stock Repurchases Executed During Period Settlement In Subsequent Period, Shares

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- Definition

The cash outflow to reacquire common stock during the period.

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

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

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