Income Taxes (Reconciliation of Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Expected tax rate	7.80%	7.80%	7.80%
Income not subject to income tax	(8.20%)	(7.30%)	(3.40%)
Foreign taxes at local expected tax rates	1.40%	2.10%	6.00%
Disallowed expenses and capital allowances	1.00%	0.70%	0.10%
Prior year refunds and adjustments	0.80%	0.40%	(0.60%)
Other	(0.50%)	(0.10%)	0.20%
Effective tax rate	2.30%	3.60%	10.10%