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OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME. (Tables) | 12 Months Ended
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Dec. 31, 2017
Stockholders' Equity Note [Abstract] |
Impact of the components of other comprehensive income on deferred tax benefits (income taxes) | The following table presents the impact of the components of other comprehensive income or loss on deferred tax benefits (income taxes).
(in millions) | 2015 |  | 2016 |  | 2017
Net deferred tax benefits (income taxes) on: |  |  |  |  |
Net unrealized holding gains or losses | $ | 5.1 |  |  | $ | .6 |  |  | $ | (14.6 | )
Reclassification adjustments recognized in the provision for income taxes: |  |  |  |  |
Capital gain distributions | 7.9 |  |  | 2.4 |  |  | 1.4 |
Net gains realized on dispositions | 20.7 |  |  | 20.9 |  |  | 32.5 |
Net gains recognized upon transfer to trading investments | — |  |  | — |  |  | 9.2 |
Other-than-temporary impairments | (1.9 | ) |  | — |  |  | — |
Net deferred tax benefits (income taxes) on net unrealized holding gains or losses | 31.8 |  |  | 23.9 |  |  | 28.5 |
Currency translation adjustments | 3.8 |  |  | 3.5 |  |  | (18.5 | )
Reclassification adjustment recognized in the provision for income taxes upon deconsolidation of T. Rowe Price investment product | (1.2 | ) |  | .8 |  |  | — |
Total deferred tax benefits (income taxes) on currency translation adjustments | 2.6 |  |  | 4.3 |  |  | (18.5 | )
Total net deferred tax benefits (income taxes) | $ | 34.4 |  |  | $ | 28.2 |  |  | $ | 10.0 |
Changes in accumulated other comprehensive income | The changes in each component of accumulated other comprehensive income (loss), including reclassification are presented below.
|  |  |  | Currency translation adjustments |  |
(in millions) |  | Net unrealized holding gains |  | Equity method investments |  | Consolidated T. Rowe Price investment products - variable interest entities |  | Total currency translation adjustments |  | Total
Balances at December 31, 2014 |  | $ | 165.5 |  |  | $ | (25.7 | ) |  | $ | (3.4 | ) |  | $ | (29.1 | ) |  | $ | 136.4 |
Other comprehensive income (loss) before reclassifications and income taxes |  | (4.5 | ) |  | (8.1 | ) |  | (4.9 | ) |  | (13.0 | ) |  | (17.5 | )
Reclassification adjustments recognized in non-operating income |  | (72.5 | ) |  | — |  |  | 5.8 |  |  | 5.8 |  |  | (66.7 | )
|  | (77.0 | ) |  | (8.1 | ) |  | .9 |  |  | (7.2 | ) |  | (84.2 | )
Net deferred tax benefits (income taxes) |  | 31.8 |  |  | 2.9 |  |  | (.3 | ) |  | 2.6 |  |  | 34.4 |
Other comprehensive income (loss) |  | (45.2 | ) |  | (5.2 | ) |  | .6 |  |  | (4.6 | ) |  | (49.8 | )
Balances at December 31, 2015 |  | 120.3 |  |  | (30.9 | ) |  | (2.8 | ) |  | (33.7 | ) |  | 86.6 |
Reclassification of accumulated other comprehensive income to retained earnings upon adoption of the new consolidation accounting guidance |  | (32.0 | ) |  | (.5 | ) |  | — |  |  | (.5 | ) |  | (32.5 | )
Balance at January 1, 2016 |  | 88.3 |  |  | (31.4 | ) |  | (2.8 | ) |  | (34.2 | ) |  | 54.1 |
Other comprehensive income (loss) before reclassifications and income taxes |  | (7.0 | ) |  | (1.6 | ) |  | (7.0 | ) |  | (8.6 | ) |  | (15.6 | )
Reclassification adjustments recognized in non-operating income |  | (53.0 | ) |  | — |  |  | (2.2 | ) |  | (2.2 | ) |  | (55.2 | )
|  | (60.0 | ) |  | (1.6 | ) |  | (9.2 | ) |  | (10.8 | ) |  | (70.8 | )
Net deferred tax benefits (income taxes) |  | 23.9 |  |  | .7 |  |  | 3.6 |  |  | 4.3 |  |  | 28.2 |
Other comprehensive income (loss) |  | (36.1 | ) |  | (.9 | ) |  | (5.6 | ) |  | (6.5 | ) |  | (42.6 | )
Balances at December 31, 2016 |  | 52.2 |  |  | (32.3 | ) |  | (8.4 | ) |  | (40.7 | ) |  | 11.5 |
Other comprehensive income (loss) before reclassifications and income taxes |  | 37.4 |  |  | 2.6 |  |  | 45.2 |  |  | 47.8 |  |  | 85.2 |
Reclassification adjustments recognized in non-operating income |  | (110.2 | ) |  | — |  |  | (.1 | ) |  | (.1 | ) |  | (110.3 | )
|  | (72.8 | ) |  | 2.6 |  |  | 45.1 |  |  | 47.7 |  |  | (25.1 | )
Net deferred tax benefits (income taxes) |  | 28.5 |  |  | (.9 | ) |  | (17.6 | ) |  | (18.5 | ) |  | 10.0 |
Other comprehensive income (loss) |  | (44.3 | ) |  | 1.7 |  |  | 27.5 |  |  | 29.2 |  |  | (15.1 | )
Balances at December 31, 2017 |  | $ | 7.9 |  |  | $ | (30.6 | ) |  | $ | 19.1 |  |  | $ | (11.5 | ) |  | $ | (3.6 | )

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e526-108580 + Details
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