Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 65.5	$ 101.9
Trade and other accounts receivable (less allowances of $4.3 million and $4.7 million respectively)	245.6	154.4
Inventories (less allowances of $9.4 million and $8.6 million respectively):
Finished goods	144.7	118.1
Raw materials	66.8	55.7
Total inventories	211.5	173.8
Prepaid expenses	4.1	6.2
Prepaid income taxes	4.0	4.8
Other current assets	2.0	0.0
Total current assets	532.7	441.1
Property, plant and equipment:
Gross cost	312.9	251.8
Less accumulated depreciation	(123.7)	(94.4)
Net property, plant and equipment	189.2	157.4
Goodwill	346.8	374.8
Other intangible assets	169.6	144.4
Deferred tax assets	16.3	14.9
Pension asset	54.9	48.0
Other non-current assets	3.1	0.8
Total assets	1,312.6	1,181.4
Current liabilities:
Accounts payable	115.7	59.6
Accrued liabilities	94.0	94.3
Current portion of long-term debt	10.3	10.3
Current portion of finance leases	2.6	1.6
Current portion of plant closure provisions	5.9	6.7
Current portion of accrued income taxes	8.2	9.4
Current portion of acquisition-related contingent consideration	1.1	1.1
Current portion of deferred income	0.1	0.1
Total current liabilities	237.9	183.1
Long-term debt, net of current portion	219.0	258.5
Finance leases, net of current portion	3.2	2.9
Plant closure provisions, net of current portion	36.8	32.8
Unrecognized tax benefits, net of current portion	1.8	2.3
Deferred tax liabilities	48.6	32.3
Pension liabilities	16.5	14.2
Deferred income, net of current portion	0.5	0.5
Other non-current liabilities	0.4	1.0
Total liabilities	564.7	527.6
Equity:
Common stock, $0.01 par value, authorized 40,000,000 shares, issued 29,554,500 shares	0.3	0.3
Additional paid-in capital	317.9	315.1
Treasury stock (5,416,924 and 5,483,341 shares at cost, respectively)	(97.1)	(97.5)
Retained earnings	619.2	561.8
Accumulated other comprehensive loss	(92.8)	(126.2)
Total Innospec stockholders' equity	747.5	653.5
Non-controlling interest	0.4	0.3
Total equity	747.9	653.8
Total liabilities and equity	$ 1,312.6	$ 1,181.4

Prepaid Expense Current Excluding Tax

No definition available.

Name:	iosp_PrepaidExpenseCurrentExcludingTax
Namespace Prefix:	iosp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).