Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Changes in Accumulated Other Comprehensive Income, Net of Tax

		Foreign currency translation adjustment	Unrealized holding gain/(loss) on available-for-sale securities	Accumulated other comprehensive loss
		$M	$M	$M
As at January 1, 2015		(25.7)	(5.8)	(31.5)
Current period change:
Net current period other comprehensive (loss)/income		(156.4)	4.1	(152.3)
As at December 31, 2015		(182.1)	(1.7)	(183.8)
		Foreign currency translation adjustment	Unrealized holding gain/(loss) on available-for-sale securities	Accumulated other comprehensive income/(loss)
		$M	$M	$M
As at January 1, 2014		110.4	(0.2)	110.2
Current period change:
	Other comprehensive (loss)/income before reclassification	(136.1)	3.7	(132.4)
	Gain transferred to the income statement (within Other income, net) on disposal of available-for-sale securities	-	(9.3)	(9.3)
Net current period other comprehensive loss		(136.1)	(5.6)	(141.7)
As at December 31, 2014		(25.7)	(5.8)	(31.5)
		Foreign currency translation adjustment	Unrealized holding gain/(loss) on available-for-sale securities	Accumulated other comprehensive income
		$M	$M	$M
As at January 1, 2013		85.1	1.8	86.9
Current period change:
	Other comprehensive (loss)/income before reclassification	25.3	1.5	26.8
	Gain transferred to the income statement (within Other income, net) on disposal of available-for-sale securities	-	(3.5)	(3.5)
Net current period other comprehensive loss		25.3	(2.0)	23.3
As at December 31, 2013		110.4	(0.2)	110.2