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OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE LOSS. (Deferred Tax Benefits (Income Taxes)) (Details) - Currency translation adjustments [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Net deferred tax benefits on other comprehensive income (loss) before reclassifications | $ 3.4 | $ 2.3 | $ 2.5 | $ 4.9
Net deferred tax benefits on reclassification adjustment recognized in the provision for income taxes upon deconsolidation of a T. Rowe Price investment product | 0.0 | 0.0 | 0.0 | 0.9
Total deferred tax benefits | $ 3.4 | $ 2.3 | $ 2.5 | $ 5.8

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