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CONSOLIDATED T. ROWE PRICE INVESTMENT PRODUCTS. (Operating Results) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating expenses reflected in net operating income | $ (780.1) | $ (750.3) | $ (1,574.9) | $ (1,494.5)
Income before income taxes | 739.6 | 628.8 | 1,474.9 | 1,228.7
Net income (loss) attributable to redeemable non-controlling interests | 28.4 | 10.7 | 69.8 | 12.5
Operating expenses eliminated against investment advisory and administrative fees | 1,395.2 | 1,345.0 | 2,722.5 | 2,673.0
Consolidation eliminations [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating expenses reflected in net operating income | (2.2) | (1.4) | (3.7) | (3.1)
Consolidated T. Rowe Price investment products [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Income before income taxes | 59.0 | 16.0 | 157.8 | 14.3
Net income (loss) attributable to T. Rowe Price Group | 30.6 | 5.3 | 88.0 | 1.8
Net income (loss) attributable to redeemable non-controlling interests | 28.4 | 10.7 | 69.8 | 12.5
Consolidated T. Rowe Price investment products [Member] | Reportable entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating expenses reflected in net operating income | (3.8) | (3.1) | (6.9) | (5.6)
Net investment income (loss) reflected in non-operating income | 62.8 | 19.1 | 164.7 | 19.9
Income before income taxes | 59.0 | 16.0 | 157.8 | 14.3
Voting interest entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Income before income taxes | 10.7 | (0.2) | 18.4 | (1.3)
Net income (loss) attributable to T. Rowe Price Group | 5.2 | (0.6) | 13.9 | (1.3)
Net income (loss) attributable to redeemable non-controlling interests | 5.5 | 0.4 | 4.5 | 0.0
Voting interest entities [Member] | Reportable entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating expenses reflected in net operating income | (0.7) | (0.4) | (1.0) | (0.7)
Net investment income (loss) reflected in non-operating income | 11.4 | 0.2 | 19.4 | (0.6)
Income before income taxes | 10.7 | (0.2) | 18.4 | (1.3)
Variable interest entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Income before income taxes | 48.3 | 16.2 | 139.4 | 15.6
Net income (loss) attributable to T. Rowe Price Group | 25.4 | 5.9 | 74.1 | 3.1
Net income (loss) attributable to redeemable non-controlling interests | 22.9 | 10.3 | 65.3 | 12.5
Variable interest entities [Member] | Reportable entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating expenses reflected in net operating income | (3.1) | (2.7) | (5.9) | (4.9)
Net investment income (loss) reflected in non-operating income | 51.4 | 18.9 | 145.3 | 20.5
Income before income taxes | $ 48.3 | $ 16.2 | $ 139.4 | $ 15.6

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