LONG-TERM DEBT, NET - If-Converted Value in Excess of Principal (Details) - Senior Notes - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
---|---|---|
Jun. 30, 2020 |
Dec. 31, 2019 |
|
2022 Exchangeable Notes | ||
Debt Instrument [Line Items] | ||
If-converted value in excess of principal | $ 706.6 | $ 329.6 |
2026 Exchangeable Notes | ||
Debt Instrument [Line Items] | ||
If-converted value in excess of principal | 108.6 | |
2030 Exchangeable Notes | ||
Debt Instrument [Line Items] | ||
If-converted value in excess of principal | $ 135.4 |