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Revenue Related to Contracts With Customers (Details) | 6 Months Ended
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Jun. 30, 2018
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-04-01 |
Disaggregation of Revenue [Line Items] |
Performance obligations expected to be satisfied, percentage | 44.00%
Performance obligations expected to be satisfied, expected timing | 2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 |
Disaggregation of Revenue [Line Items] |
Performance obligations expected to be satisfied, percentage | 62.00%
Performance obligations expected to be satisfied, expected timing | 5 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01 |
Disaggregation of Revenue [Line Items] |
Performance obligations expected to be satisfied, percentage | 89.00%
Performance obligations expected to be satisfied, expected timing | 15 years

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- Definition Period in which remaining performance obligation is expected to be recognized as revenue, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130556-203045 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=84173487&loc=SL51747714-108306 + Details
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