Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 106.1	$ 123.1
Trade and other accounts receivable (less allowances of $4.6 million and $2.9 million respectively)	280.0	279.7
Inventories (less allowances of $14.2 million and $13.6 million respectively):
Finished goods	178.4	180.2
Raw materials	69.8	67.8
Total inventories	248.2	248.0
Prepaid expenses	11.9	11.6
Prepaid income taxes	4.3	1.5
Total current assets	650.5	663.9
Net property, plant and equipment	200.3	196.4
Goodwill	364.3	364.9
Operating lease right-of-use assets	36.0	0.0
Other intangible assets	125.1	136.3
Deferred tax assets	8.6	8.8
Pension asset	99.4	95.9
Other non-current assets	5.4	7.2
Total assets	1,489.6	1,473.4
Current liabilities:
Overdraft	0.7	0.0
Accounts payable	117.1	126.8
Accrued liabilities	132.0	132.1
Current portion of long-term debt	21.5	21.4
Current portion of finance leases	1.3	1.8
Current portion of plant closure provisions	5.3	5.9
Current portion of accrued income taxes	14.2	8.6
Current portion of operating lease liabilities	11.6	0.0
Total current liabilities	303.7	296.6
Long-term debt, net of current portion	136.5	186.2
Finance leases, net of current portion	0.9	1.5
Plant closure provisions, net of current portion	44.1	43.6
Accrued income taxes, net of current portion	36.3	40.0
Unrecognized tax benefits, net of current portion	14.6	14.0
Operating lease liabilities, net of current portion	24.4	0.0
Deferred tax liabilities	48.1	48.2
Pension liabilities and post-employment benefits	16.0	15.7
Other non-current liabilities	1.9	2.1
Total liabilities	626.5	647.9
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	327.7	324.9
Treasury stock (5,068,175 and 5,120,799 shares at cost, respectively)	(93.4)	(92.8)
Retained earnings	707.1	668.3
Accumulated other comprehensive loss	(79.0)	(75.7)
Total Innospec stockholders' equity	862.7	825.0
Non-controlling interest	0.4	0.5
Total equity	863.1	825.5
Total liabilities and equity	$ 1,489.6	$ 1,473.4

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).