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STOCKHOLDER"S EQUITY - Dividends (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		6 Months Ended
	May 22, 2019	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2019	Apr. 30, 2018
Dividends Paid
Aggregate amount of cash dividends paid		$ 52	$ 48	$ 104	$ 96
Common Stock, Dividends, Per Share, Declared		$ 0.164	$ 0.149	$ 0.328	$ 0.298
Dividends, Common Stock, Cash		$ 52	$ 48	$ 104	$ 96
Subsequent Event [Member]
Dividends Paid
Dividends Payable, Date Declared	May 22, 2019
Common Stock, Dividends, Per Share, Declared	$ 0.164
Dividends, Common Stock, Cash	$ 53
Dividends Payable, Date to be Paid	Jul. 24, 2019
Dividends Payable, Date of Record	Jul. 02, 2019

X

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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Date the dividend to be paid was declared, in CCYY-MM-DD format.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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