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OTHER COMPREHENSIVE INCOME AND ACCUMULATED OTHER COMPREHENSIVE INCOME. (Reclassification Adjustments) (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2017
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income | $ (202.8) | $ (16.1) |
Provision for income taxes | 181.3 | 144.4 |
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 | 0.0 |
Reclassification out of accumulated other comprehensive income [Member] | Currency translation adjustments [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income | (0.1) | (3.1) |
Provision for income taxes | 0.0 | 0.8 |
Reclassification out of accumulated other comprehensive income [Member] | Accumulated other comprehensive income (loss) [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Non-operating income | (0.1) | (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 | 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 | $ (0.1) | $ (3.1) |
Accounting standards update 2018-02, available for sale securities [Member] | Retained earnings [Member] |  |  |
Reclassification adjustment out of accumulated other comprehensive income |  |  |
Reclassification adjustment of stranded taxes on available-for-sale investments |  |  | $ (1.7)
Accounting standards update 2018-02, available for sale securities [Member] | 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

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