Taxation (Reconciliation Between Statutory and Effective Tax Rates on Income from Operations) (Details)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory Rate	35.00%	35.00%	35.00%
Foreign jurisdiction statutory income tax rates	(8.50%)	(9.40%)	(9.50%)
State taxes, net of federal tax effect	1.40%	1.50%	1.40%
Change in valuation allowance for unrecognized tax losses	(0.10%)	(0.10%)	0.80%
Other	0.50%	0.70%	0.70%
(Gains)/losses attributable to noncontrolling interests	(0.30%)	(0.90%)	3.10%
Effective tax rate per Consolidated Statements of Income	28.00%	26.80%	31.50%

Effective Income Tax Rate Reconciliation Change In Valuation Allowance For Unrecognized Tax Losses

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to noncontrolling interest income (loss) exempt from income taxes.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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