Share-based Compensation (Stock Award Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Performance Share Units (PSUs) [Member] Class A ordinary shares, $0.01 nominal value. Issued and outstanding 219,696,185 and 222,081,117 shares, respectively	Mar. 31, 2014 Performance Share Units (PSUs) [Member] Class C Ordinary Shares [Member]	May 05, 2014 Share Incentive Awards [Member] Class A ordinary shares, $0.01 nominal value. Issued and outstanding 219,696,185 and 222,081,117 shares, respectively Subsequent Event [Member]	May 05, 2014 Share Incentive Awards [Member] Class B Ordinary Shares [Member] Subsequent Event [Member]	May 05, 2014 Share Incentive Awards [Member] Class C Ordinary Shares [Member] Subsequent Event [Member]
Number of shares
Outstanding at beginning of period (in shares)		924,648	2,744,452
Granted (in shares)		272,464	546,016
Performance adjustment (in shares)		(138,668)	(416,004)
Forfeited (in shares)		(12,844)	(38,532)
Released from restrictions (in shares)		(137,126)	(411,378)
Outstanding at end of period (in shares)		908,474	2,424,554
Weighted average grant-date fair value per share
Outstanding at beginning of period (in dollars per shares)		$ 32.05	$ 29.99
Granted (in dollars per shares)		$ 41.61	$ 40.72
Performance adjustment (in dollars per shares)		$ 26.17	$ 24.73
Forfeited (in dollars per shares)		$ 30.96	$ 29.03
Released from restrictions (in dollars per shares)		$ 26.21	$ 24.76
Outstanding at end of period (in dollars per shares)		$ 36.71	$ 34.21
Weighted average remaining contractual term, in years
Outstanding at end of period		1 year 8 months 12 days	1 year 8 months 12 days
Percent of PSUs Granted Not Earned	66.30%
Number of shares authorized (in shares)				3,600,000	1,000,000	5,200,000