Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Earnings Per Share [Abstract]
Net Income Attributable to Parent	$ 199,317	$ 114,761	$ 75,670	$ 56,876	$ 202,315	$ 146,318	$ 129,324	$ 112,050	$ 446,624	$ 590,007	$ 748,151
Basic weighted-average shares	127,310	126,722	128,205	138,145	141,909	144,750	146,622	146,751	130,095	145,008	151,984
Common stock equivalents									1,152	1,493	2,217
Diluted weighted-average shares	128,892	127,399	128,809	139,889	143,567	146,275	148,129	148,032	131,247	146,501	154,201
Debt Instrument [Line Items]
Shares Issued under Stock Incentive and Employee Stock Purchase Plans									1,541	1,394	1,066
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount									2,141	1,156	813