Consolidated Statements of Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2017
Chaucer [Member]
Income (loss) from discontinued operations, income tax benefit (expense)	$ 26.6	$ 10.4
Life [Member]
Income (loss) from discontinued operations, income tax benefit (expense)	$ 0.8	$ 0.8

- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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