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OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME. (Reclassification Adjustments) (Details) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Dec. 31, 2017 | Mar. 31, 2018 | Mar. 31, 2017
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | $ (16.1) | $ (115.0)
Provision for income taxes |  | 144.4 | 236.3
Retained earnings [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Reclassification adjustment of stranded taxes on available-for-sale investments | $ 1.7 |  |
Total accumulated other comprehensive income (loss) [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Reclassification adjustment of stranded taxes on available-for-sale investments | $ (1.7) |  |
Reclassification out of accumulated other comprehensive income [Member] | Net unrealized holding gains or losses [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | 0.0 |
Reclassification out of accumulated other comprehensive income [Member] | Net gains realized on dispositions [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Provision for income taxes |  | 0.0 | 18.6
Reclassification out of accumulated other comprehensive income [Member] | Currency translation adjustments [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | (3.1) | 0.0
Provision for income taxes |  | 0.8 | $ 0.0
Reclassification out of accumulated other comprehensive income [Member] | Total accumulated other comprehensive income (loss) [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | (3.1) |
Equity method investments [Member] | Reclassification out of accumulated other comprehensive income [Member] | Currency translation adjustments [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | 0.0 |
Variable interest entities [Member] | Reclassification out of accumulated other comprehensive income [Member] | Currency translation adjustments [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income |  | $ (3.1) |

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- Definition Tax Cuts And Jobs Act Of 2017, Reclassification From AOCI To Retained Earnings, Available-For-Sale Investments, Tax Effect + References No definition available. + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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