Segment Disclosure - Schedule of Segment Reporting Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Apr. 30, 2025	Apr. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 1,604,266	$ 1,454,712	$ 3,059,581	$ 2,965,701
Adjusted operating income	376,426	332,072	628,265	684,698
Design Automation:
Segment Reporting Information [Line Items]
Revenue	1,122,235	1,054,933	2,142,451	2,040,272
Adjusted operating income	$ 458,756	$ 418,245	$ 863,426	$ 777,710
Adjusted operating margin	41.00%	40.00%	40.00%	38.00%
Design IP:
Segment Reporting Information [Line Items]
Revenue	$ 482,031	$ 399,779	$ 917,130	$ 925,429
Adjusted operating income	$ 150,514	$ 124,797	$ 277,061	$ 370,524
Adjusted operating margin	31.00%	31.00%	30.00%	40.00%
Operating Segments
Segment Reporting Information [Line Items]
Adjusted operating income	$ 609,270	$ 543,042	$ 1,140,487	$ 1,148,234
Adjusted operating margin	38.00%	37.00%	37.00%	39.00%