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FAIR VALUE MEASUREMENT - Total return swap contracts (Details) - Total return swap contract - shares | Dec. 31, 2019 | Dec. 31, 2018
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Financial Instruments |  |
Units outstanding | 5,695,000 |
Percent of stock units that were economically hedged | 84.40% | 89.50%

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- Definition Number of capital units or capital shares outstanding. This element is relevant to issuers of face-amount certificates and registered investment companies. + References No definition available. + Details
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- Definition The percent of other equity instruments (other than share options) that were economically hedged in a share-based payment arrangement. + References No definition available. + Details
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- Details
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