Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 101.9	$ 136.9
Short-term investments	0.0	4.8
Trade and other accounts receivable (less allowances of $4.7 million and $3.6 million, respectively)	154.4	137.4
Inventories (less allowances of $8.6 million and $8.8 million, respectively):
Finished goods	118.1	104.4
Raw materials	55.7	55.5
Total inventories	173.8	159.9
Current portion of deferred tax assets	0.0	8.8
Prepaid expenses	6.2	6.1
Prepaid income taxes	4.8	3.0
Other current assets	0.0	1.8
Total current assets	441.1	458.7
Net property, plant and equipment	157.4	76.0
Goodwill	374.8	267.4
Other intangible assets	144.4	168.7
Deferred tax assets, net of current portion	14.9	1.4
Pension asset	48.0	55.5
Other non-current assets	0.8	0.9
Total assets	1,181.4	1,028.6
Current liabilities:
Accounts payable	59.6	52.2
Accrued liabilities	94.3	84.1
Current portion of long-term debt	10.3	0.0
Current portion of finance leases	1.6	0.7
Current portion of plant closure provisions	6.7	6.4
Current portion of accrued income taxes	9.4	7.9
Current portion of acquisition-related contingent consideration	1.1	54.6
Current portion of deferred income	0.1	0.2
Total current liabilities	183.1	206.1
Long-term debt, net of current portion	258.5	131.6
Finance leases, net of current portion	2.9	2.4
Plant closure provisions, net of current portion	32.8	31.3
Unrecognized tax benefits	2.3	3.9
Deferred tax liabilities	32.3	37.7
Pension liabilities	14.2	9.2
Deferred income, net of current portion	0.5	0.6
Other non-current liabilities	1.0	0.5
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	315.1	311.0
Treasury stock (5,483,341 and 5,453,078 shares at cost, respectively)	(97.5)	(91.8)
Retained earnings	561.8	496.4
Accumulated other comprehensive loss	(126.2)	(110.9)
Total Innospec stockholders' equity	653.5	605.0
Non-controlling interest	0.3	0.3
Total equity	653.8	605.3
Total liabilities and equity	$ 1,181.4	$ 1,028.6

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).