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Supplementary Data Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] | Supplemental Cash Flow Information
| Years ended December 31,
| 2017 |  | 2016 |  | 2015
Cash paid for interest | $ | 82.3 |  |  | $ | 78.8 |  |  | $ | 74.5 |
Cash paid for income taxes, net of refunds 1 | 228.4 |  |  | 244.1 |  |  | 231.9 |
1 | Refunds of $31.9, $26.6 and $13.0 were received for the years ended December 31, 2017, 2016 and 2015, respectively.

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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- References No definition available. + Details
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