Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2014

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 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/(expense), net) on disposal of available-for-sale securities	0	(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)