Segment Disclosure - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 820,401	$ 769,426
Adjusted operating income	147,414	107,718
Operating Segments
Segment Reporting Information [Line Items]
Total revenue	820,401	769,426
Adjusted operating income	$ 200,952	$ 195,946
Adjusted operating margin	24.00%	25.00%
Operating Segments | Semiconductor & System Design:
Segment Reporting Information [Line Items]
Total revenue	$ 737,906	$ 705,333
Adjusted operating income	$ 195,317	$ 199,116
Adjusted operating margin	26.00%	28.00%
Operating Segments | Adjusted operating margin
Segment Reporting Information [Line Items]
Total revenue	$ 82,495	$ 64,093
Adjusted operating income	$ 5,635	$ (3,170)
Adjusted operating margin	7.00%	(5.00%)