Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 75.7	$ 123.1
Trade and other accounts receivable (less allowances of $3.8 million and $2.9 million, respectively)	292.0	279.7
Inventories (less allowances of $14.5 million and $13.6 million, respectively):
Finished goods	173.9	180.2
Raw materials	70.7	67.8
Total inventories	244.6	248.0
Prepaid expenses	14.7	11.6
Prepaid income taxes	2.5	1.5
Other current assets	0.8	0.0
Total current assets	630.3	663.9
Net property, plant and equipment	198.7	196.4
Operating lease right-of-use assets	32.4	0.0
Goodwill	363.0	364.9
Other intangible assets	113.5	136.3
Deferred tax assets	9.1	8.8
Pension asset	115.9	95.9
Other non-current assets	5.9	7.2
Total assets	1,468.8	1,473.4
Current liabilities:
Accounts payable	122.0	126.8
Accrued liabilities	154.0	132.1
Current portion of long-term debt	0.0	21.4
Current portion of finance leases	1.0	1.8
Current portion of plant closure provisions	5.6	5.9
Current portion of accrued income taxes	10.3	8.6
Current portion of operating lease liabilities	10.6	0.0
Total current liabilities	303.5	296.6
Long-term debt, net of current portion	58.6	186.2
Finance leases, net of current portion	0.5	1.5
Operating lease liabilities, net of current portion	21.9	0.0
Plant closure provisions, net of current portion	43.7	43.6
Accrued income taxes, net of current portion	36.2	40.0
Unrecognized tax benefits, net of current portion	16.4	14.0
Deferred tax liabilities	49.6	48.2
Pension liabilities and post-employment benefits	17.8	15.7
Other non-current liabilities	1.7	2.1
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	330.4	324.9
Treasury stock (5,047,278 and 5,120,799 shares at cost, respectively)	(93.3)	(92.8)
Retained earnings	755.5	668.3
Accumulated other comprehensive loss	(74.4)	(75.7)
Total Innospec stockholders' equity	918.5	825.0
Non-controlling interest	0.4	0.5
Total equity	918.9	825.5
Total liabilities and equity	$ 1,468.8	$ 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).