CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Income tax relating to changes in fair value of investments	$ 0.3	$ 0.0
Income tax relating to investments sold	0.0	0.0
Income tax relating to changes in fair value of derivative instruments designated as cash flow hedges	4.8	10.6
Income tax relating to derivatives settled	$ (5.9)	$ (1.1)

The amount of income tax relating to amounts recognised in other comprehensive income in relation to available-for-sale financial assets. [Refer: Financial assets available-for-sale; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

+ References

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to derivatives.

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The amount of income tax relating to amounts recognised in other comprehensive income in relation to investments sold.

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