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CONSOLIDATED FINANCIAL STATEMENT DETAILS - Long-term investments (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Long-term investments |  |  |
Equity investments at FVOCI | $ 113.0 | $ 126.2 |
Gains (losses) in AOCI | (23.7) | (20.4) | $ (98.5)
Long-term Investments |  |  |
Long-term investments |  |  |
Gains (losses) in AOCI | (25.9) | (26.2) |
Investments in an accumulated gain position |  |  |
Long-term investments |  |  |
Equity investments at FVOCI | 80.9 | 79.8 |
Gains (losses) in AOCI | 18.2 | 10.3 |
Investments in an accumulated loss position |  |  |
Long-term investments |  |  |
Equity investments at FVOCI | 32.1 | 46.4 |
Gains (losses) in AOCI | (47.0) | $ (36.5) |
Net realized gains (losses) |  |  |
Long-term investments |  |  |
Gains (losses) in AOCI | $ 2.9 |  |

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