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Restructuring and Impairment Activities (Tables) | 12 Months Ended
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Dec. 31, 2016
Restructuring and Related Activities [Abstract] |
Changes in Restructuring Liabilities | Changes in the restructuring liabilities, substantially all of which are employee-related, are summarized as follows ($ in millions):
| 2016 |  | 2015
Balance at beginning of year | $ | 7.7 |  |  | $ | 8.7 |
Accruals for announced programs | 4.3 |  |  | 8.0 |
Cash payments | (8.4 | ) |  | (8.3 | )
Exchange rate impacts | 0.7 |  |  | (0.7 | )
Balance at end of period | $ | 4.3 |  |  | $ | 7.7 |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 + Details
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