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RELATED PARTIES (Summary of Balance Sheet Presentation) (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Related Party Transaction [Line Items] |  |
Partnership distribution payable | $ 0.0 | $ (43.5)
Related Party Transaction, Due from (to) Related Party | 152.6 | 220.0
Trade Accounts Receivable [Member] |  |
Related Party Transaction [Line Items] |  |
Due from Related Parties, Current | 108.7 | 176.0
Derivative Asset [Member] |  |
Related Party Transaction [Line Items] |  |
Due from Related Parties, Current | 71.2 | 89.3
Derivative Liability [Member] |  |
Related Party Transaction [Line Items] |  |
Due to Related Parties, Current | (26.1) | 0.0
Other Current Assets [Member] |  |
Related Party Transaction [Line Items] |  |
Due from Related Parties, Current | 0.2 | 0.0
Other Current Liabilities [Member] |  |
Related Party Transaction [Line Items] |  |
Due to Related Parties, Current | $ (1.4) | $ (1.8)

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- Definition The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(k)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(11)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(2)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6676-107765 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 + Details
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