Equity (Reconciliation of Ordinary Shares) (Details) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Ordinary shares [Member]
Beginning balance, shares	282.7	295.6	297.1
Shares issued under incentive plans	3.2
Repurchase of ordinary shares	(19.6)	(20.8)	(18.4)
Ending balance, shares	266.3	282.7	295.6
Treasury Stock [Member]
Beginning balance, shares	0
Shares issued under incentive plans	0
Repurchase of ordinary shares	3.4
Ending balance, shares	3.4