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Environmental Obligations Environmental Reserve Rollforward (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accrual for Environmental Loss Contingencies [Roll Forward] |  |  |
Total environmental reserves, net of recoveries beginning of period | $ 411.8 | $ 360.4 | $ 334.3
Provision | 178.2 | 105.6 | 80.8
Spending, net of recoveries | (65.7) | (63.3) | (52.1)
Acquisitions |  | 2.6 |
Foreign currency translation adjustments | (2.8) | 6.5 | (2.6)
Net Change | 109.7 | 51.4 | 26.1
Total environmental reserves, net of recoveries end of period | $ 521.5 | $ 411.8 | $ 360.4

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- Definition Total costs accrued as of the balance sheet date for environmental loss contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6395460&loc=d3e13647-108346 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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