XML 48 R67.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Goodwill - Summary of Goodwill (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013
--- | ---
Fuel Specialties [Member] |
Goodwill [Line Items] |
Historical accumulated amortization | $ 8.7
Performance Chemicals [Member] |
Goodwill [Line Items] |
Historical accumulated amortization | 0.3
Octane Additives [Member] |
Goodwill [Line Items] |
Historical accumulated amortization | $ 289.5

X
- Definition Goodwill historical accumulated amortization. + References No definition available. + Details
Name: | iosp_GoodwillHistoricalAccumulatedAmortization
Namespace Prefix: | iosp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_GoodwillLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration