Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 45.4	$ 101.9
Trade and other accounts receivable (less allowances of $4.2 million and $4.7 million, respectively)	219.3	154.4
Inventories (less allowances of $9.2 million and $8.6 million, respectively):
Finished goods	140.3	118.1
Raw materials	58.7	55.7
Total inventories	199.0	173.8
Prepaid expenses	7.2	6.2
Prepaid income taxes	5.2	4.8
Total current assets	476.1	441.1
Property, plant and equipment:
Gross cost	278.1	251.8
Less accumulated depreciation	(101.0)	(94.4)
Net property, plant and equipment	177.1	157.4
Goodwill	335.4	374.8
Other intangible assets	171.2	144.4
Deferred tax assets	14.3	14.9
Pension asset	50.2	48.0
Other non-current assets	1.1	0.8
Total assets	1,225.4	1,181.4
Current liabilities:
Accounts payable	97.5	59.6
Accrued liabilities	90.4	94.3
Current portion of long term debt	10.3	10.3
Current portion of finance leases	2.0	1.6
Current portion of plant closure provisions	6.4	6.7
Current portion of accrued income taxes	13.9	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	221.7	183.1
Long-term debt, net of current portion	228.7	258.5
Finance leases, net of current portion	2.7	2.9
Plant closure provisions, net of current portion	34.2	32.8
Unrecognized tax benefits	2.3	2.3
Deferred tax liabilities	43.3	32.3
Pension liability	14.6	14.2
Deferred income, net of current portion	0.5	0.5
Other non-current liabilities	0.9	1.0
Total liabilities	548.9	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	315.7	315.1
Treasury stock (5,423,738 and 5,483,341 shares at cost, respectively)	(97.1)	(97.5)
Retained earnings	579.0	561.8
Accumulated other comprehensive loss	(121.7)	(126.2)
Total Innospec stockholders' equity	676.2	653.5
Non-controlling interest	0.3	0.3
Total equity	676.5	653.8
Total liabilities and equity	$ 1,225.4	$ 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).