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Components of accumulated other comprehensive loss (Tables) | 9 Months Ended
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Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated balances for each component of AOCI |
| September 30, 2018 |  | December 31, 2017
Defined benefit plan liabilities | $ | (97.7 | ) |  | $ | (102.1 | )
Unrealized loss on financial instruments | 2.5 |  |  | 2.7 |
Other comprehensive loss before income tax effect | (95.2 | ) |  | (99.4 | )
Income tax effect (1) | 6.5 |  |  | 7.7 |
Accumulated other comprehensive loss | $ | (88.7 | ) |  | $ | (91.7 | )
(1) The allocation of the income tax effect to the components of other comprehensive loss is as follows:
| September 30, 2018 |  | December 31, 2017
Defined benefit plan liabilities | $ | 7.0 |  |  | $ | 8.2 |
Unrealized loss on financial instruments | (0.5 | ) |  | (0.5 | )
The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive loss ("AOCL"):
| Defined benefit plan and other postretirement liabilities |  | Unrealized gain (loss) on financial instruments |  | Total, net of tax
Balance, July 1, 2018 | $ | (90.8 | ) |  | $ | 2.1 |  |  | $ | (88.7 | )
Net amount reclassified to net income (loss) | 0.1 |  |  | 0.0 |  |  | 0.1 |
Balance, September 30, 2018 | $ | (90.7 | ) |  | $ | 2.1 |  |  | $ | (88.7 | )
Balance, July 1, 2017 | $ | (115.2 | ) |  | $ | 2.2 |  |  | $ | (113.0 | )
Net amount reclassified to net income (loss) | 1.0 |  |  | 0.0 |  | 1.0 |
Balance, September 30, 2017 | $ | (114.2 | ) |  | $ | 2.2 |  |  | $ | (112.0 | )
Balance, January 1, 2018 | $ | (93.8 | ) |  | $ | 2.1 |  |  | $ | (91.7 | )
Net amount reclassified to net income (loss) | 3.2 |  |  | (0.1 | ) |  | 3.1 |
Balance, September 30, 2018 | $ | (90.7 | ) |  | $ | 2.1 |  |  | $ | (88.7 | )
Balance, January 1, 2017 | $ | (116.2 | ) |  | $ | 2.3 |  |  | $ | (113.9 | )
Net amount reclassified to net income (loss) | 2.0 |  |  | (0.1 | ) |  | 1.9 |
Balance, September 30, 2017 | $ | (114.2 | ) |  | $ | 2.2 |  |  | $ | (112.0 | )
Reclassification out of AOCI | Reclassifications out of AOCL were included in the consolidated statements of operations as follows:
|  |  |  | Three months ended September 30, |  | Nine months ended September 30,
AOCL Components |  | Location |  | 2018 |  | 2017 |  | 2018 |  | 2017
Defined benefit plan and other postretirement liabilities |  | Cost of goods sold |  | $ | 0.5 |  |  | $ | 1.0 |  |  | $ | 3.9 |  |  | $ | 0.8 |
|  | Selling, general and administrative expenses |  | (0.4 | ) |  | 0.1 |  |  | (0.9 | ) |  | 1.1 |
|  | Other operating expense, net |  | 0.4 |  |  | 0.4 |  |  | 1.3 |  |  | 1.3 |
|  | Income tax effect |  | (0.4 | ) |  | (0.4 | ) |  | (1.1 | ) |  | (1.2 | )
|  | Net of tax |  | $ | 0.1 |  |  | $ | 1.1 |  |  | $ | 3.2 |  |  | $ | 2.0 |
Unrealized loss on financial instruments |  | Cost of goods sold |  | $ | 0.0 |  |  | $ | 0.0 |  |  | $ | (0.1 | ) |  | $ | (0.1 | )
|  | Income tax effect |  | 0.0 |  |  | 0.0 |  |  | 0.0 |  |  | 0.0 |
|  | Net of tax |  | $ | 0.0 |  |  | $ | 0.0 |  |  | $ | (0.1 | ) |  | $ | (0.1 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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