Stockholders' Equity (Details) - $ / shares shares in Thousands	3 Months Ended	6 Months Ended
Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2021	Apr. 30, 2020
Stock Repurchase Program [Abstract]
Number of shares purchased	5	4,252	4,032	15,938
Average price per share	$ 55.11	$ 37.05	$ 44.56	$ 39.75
Remaining authorization at April 30:	15,952	19,998	15,952	19,998

Number of shares that have been repurchased during the period and are being held in treasury.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Balance Type:	na
Period Type:	duration