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Recent accounting pronouncements and accounting changes (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Changes and Error Corrections [Abstract] |
Schedule of Amounts Reclassified in Consolidated Statements of Cash Flows | Amounts reclassified in the consolidated statements of cash flows for the years ended December 31, 2016 and 2015 are as follows:
Year ended December 31, | 2016 |  |  | 2015 |
Cash flows from operating activities |  |  |
Other assets | $ | (1.9 | ) | 2.60 |  | $ | 2.6 |
Cash flows from investing activities |  |  |
Other | 1.6 |  |  | (2.3 | )
Effect of exchange rate changes on cash, cash equivalents and restricted cash | (0.8 | ) |  | (4.6 | )
Cash, cash equivalents and restricted cash, beginning of year | 31.6 |  |  | 35.9 |
Cash, cash equivalents and restricted cash, end of year | 30.5 |  |  | 31.6 |

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22580-107794 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e765-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22499-107794 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64853466&loc=d3e22583-107794 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=68064558&loc=d3e725-108305 + Details
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