Equity (Reconciliation of Ordinary Shares) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Repurchase of ordinary shares	4.4
Ordinary shares [Member]
Beginning balance, shares	266.3	282.7	295.6
Shares issued under incentive plans	2.7
Repurchase of ordinary shares	0.0	19.6	20.8
Ending balance, shares	269.0	266.3	282.7
Treasury Stock [Member]
Beginning balance, shares	3.4
Shares issued under incentive plans	0.0
Repurchase of ordinary shares	4.4
Ending balance, shares	7.8	3.4