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LONG-TERM DEBT, NET - If-Converted Value in Excess of Principal (Details) - Senior Notes - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
2022 Exchangeable Notes
Debt Instrument [Line Items]
If-converted value in excess of principal	$ 784.2	$ 329.6
2026 Exchangeable Notes
Debt Instrument [Line Items]
If-converted value in excess of principal	152.0
2030 Exchangeable Notes
Debt Instrument [Line Items]
If-converted value in excess of principal	$ 180.5

X

- Definition

The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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