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Consolidated Statements Of Comprehensive Income (Parenthetical) (Unaudited) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Other comprehensive income/(loss), tax | $ 10.1 | $ (2.3)
Reclassifications to earnings on available-for-sale securities | 0.0 | 0.0
Reclassifications to earnings of gains on cash flow hedging instruments | 1.5 | $ 0.5
ASU 2018-02 [Member] |  |
Reclassification to retained earnings related to cash flow hedges and investment portfolio credit risk | $ 3.1 |

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