XML 74 R99.htm IDEA: XBRL DOCUMENT v2.4.1.9
Segment Disclosure - Property and Equipment By Geographic Areas (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2014
Oct. 31, 2013
Long-Lived Assets by Geographical Areas [Line Items]    
Property and equipment, net $ 249,098us-gaap_PropertyPlantAndEquipmentNet $ 197,600us-gaap_PropertyPlantAndEquipmentNet
United States    
Long-Lived Assets by Geographical Areas [Line Items]    
Property and equipment, net 181,019us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
133,310us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= country_US
Other Countries    
Long-Lived Assets by Geographical Areas [Line Items]    
Property and equipment, net $ 68,079us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= snps_OtherCountriesMember
$ 64,290us-gaap_PropertyPlantAndEquipmentNet
/ us-gaap_StatementGeographicalAxis
= snps_OtherCountriesMember