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Commitments and Contingencies, Liquidity Option Agreement (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Liquidity Option Agreement [Abstract] |  |  |  |  |
Change in fair market value of Liquidity Option Agreement | $ 38.7 | $ 18.5 | $ 123.1 | $ 34.9 |
Percentage of capital stock we agreed to purchase under liquidity option agreement |  |  | 100.00% |  |
Liquidity Option exercise period |  |  | 90 days |  |
Number of units held by limited partner | 54,807,352 |  | 54,807,352 |  |
Valuation, Income Approach [Member] | Liquidity Option Agreement [Member] |  |  |  |  |
Liquidity Option Agreement [Abstract] |  |  |  |  |
Derivative Liability | $ 513.1 |  | $ 513.1 |  | $ 390.0

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- Definition Expense (benefit) associated with the change in fair value of the Liquidity Option Agreement. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of days commencing February 1, 2020 that M&B can exercise the liquidity option agreement. + References No definition available. + Details
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- Definition Percentage of OTA capital stock we agreed to purchase from M&B under liquidity option agreement. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 + Details
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