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OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME. (Deferred Tax Benefits (Income Taxes)) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Currency translation adjustments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net deferred tax benefits (income taxes) on other comprehensive income before reclassifications | $ 0.5 | $ 8.3 | $ (18.5)
Net deferred tax benefits (income taxes) on reclassifications from AOCI | 0.0 | 0.9 | 0.0
Total net deferred tax benefits (income taxes) | 0.5 | 9.2 | (18.5)
Net unrealized holding gains or losses |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net deferred tax benefits (income taxes) on other comprehensive income before reclassifications | 0.0 | 0.0 | (14.6)
Total net deferred tax benefits (income taxes) | 0.0 | 0.0 | 28.5
Capital gain distributions |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net deferred tax benefits (income taxes) on reclassifications from AOCI | 0.0 | 0.0 | 1.4
Net gains realized on dispositions |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net deferred tax benefits (income taxes) on reclassifications from AOCI | 0.0 | 0.0 | 32.5
Net gains recognized upon transfer to trading investments |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Net deferred tax benefits (income taxes) on reclassifications from AOCI | 0.0 | 0.0 | 9.2
Total accumulated other comprehensive income |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |
Total net deferred tax benefits (income taxes) | $ 0.5 | $ 9.2 | $ 10.0

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