Income Taxes - Reconciliation of U.S. Statutory Tax Rate to Effective Income Tax Rate (Details)	12 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2017
Income Tax Disclosure [Abstract]
U.S. statutory rate	21.00%	23.30%	35.00%
State and local income taxes, net of federal tax benefit	5.90%	6.90%	5.50%
Federal and state tax credits	(3.90%)	(7.80%)	(7.50%)
Impact of foreign operations	(1.00%)	1.30%	(2.70%)
Changes in uncertain tax positions	(0.80%)	(6.70%)	(19.70%)
Incremental tax benefit from share-based compensation awards	(0.70%)	(3.90%)	(4.20%)
Tax credits for energy efficient government buildings	0.00%	(3.20%)	(2.20%)
Impact from goodwill impairment	0.00%	4.40%	0.00%
Transition tax on foreign earnings	(1.10%)	5.10%	0.00%
Remeasurement of U.S. deferred taxes	(0.30%)	(31.50%)	0.00%
Nondeductible expenses	2.10%	2.40%	5.70%
Other, net	(0.80%)	0.30%	0.10%
Effective tax rate	20.40%	(9.40%)	10.10%