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Commitments and contingencies (Tables) | 12 Months Ended
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Dec. 31, 2012
Change in Accrued Environmental Remediation and Related Costs | The table below presents a summary of the activity in our accrued environmental costs during the past three years. The amount charged to expense is included in corporate expense on our consolidated statements of income.
|  | Years ended December 31, |
|  | 2010 |  |  | 2011 |  |  | 2012 |
|  | (In millions) |
Balance at the beginning of the year |  | $ | 48.9 |  |  | $ | 42.3 |  |  | $ | 43.2 |
Additions charged to expense, net |  |  | .4 |  |  |  | 11.3 |  |  |  | 15.0 |
Settlement agreement |  |  | (2.0 | ) |  |  | — |  |  |  | — |
Payments, net |  |  | (5.0 | ) |  |  | (10.4 | ) |  |  | (8.1 | )
Changes in currency exchange rates |  |  | — |  |  |  | — |  |  |  | .1 |
Balance at the end of the year |  | $ | 42.3 |  |  | $ | 43.2 |  |  | $ | 50.2 |
Amounts recognized in our Consolidated Balance Sheet at the end of the year: |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | 9.7 |  |  | $ | 8.6 |  |  | $ | 7.6 |
Noncurrent liabilities |  |  | 32.6 |  |  |  | 34.6 |  |  |  | 42.6 |
Total |  | $ | 42.3 |  |  | $ | 43.2 |  |  | $ | 50.2 |
Approximate Percentage of TiO2 Sales by Volume for Segments | The table below shows the approximate percentage of our TiO 2 sales by volume for our significant markets, Europe and North America, for the last three years.
|  | 2010 |  |  | 2011 |  |  | 2012 |
Europe |  |  | 53 | % |  |  | 53 | % |  |  | 47 | %
North America |  |  | 33 | % |  |  | 32 | % |  |  | 35 | %
Future Minimum Payments Under Noncancellable Operating Leases | At December 31, 2012, future minimum payments under non-cancellable operating leases having an initial or remaining term of more than one year were as follows:
Years ending December 31, |  | Amount |
|  | (In millions) |
2013 |  | $ | 12.6 |
2014 |  |  | 8.8 |
2015 |  |  | 5.8 |
2016 |  |  | 3.8 |
2017 |  |  | 2.8 |
2018 and thereafter |  |  | 23.6 |
Total(1) |  | $ | 57.4 |

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- Definition Tabular disclosure of environmental loss contingencies by individual site. Does not include loss contingencies that are not environmental in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 10 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13237-110859 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13283-110859 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13207-110859 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 163 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=6572457&loc=d3e149879-122751 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13296-110859 + Details
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