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Contract Liabilities and Remaining Performance Obligations (Tables) | 6 Months Ended
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Jun. 30, 2018
Revenue from Contract with Customer [Abstract] |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction | The following table represents the total transaction price for the remaining performance obligations as of June 30, 2018 related to non-cancelable contracts longer than 12 months in duration that is expected to be recognized over future periods.
(in millions) |  | Within 1 Year |  | Years 1-2 |  | Years 2-3 |  | Thereafter
Remaining performance obligations |  | $ | 33.6 |  |  | $ | 20.8 |  |  | $ | 6.2 |  |  | $ | 0.9 |

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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130556-203045 + Details
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