Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Effective Tax Rate Reconciliation [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, State and Local Income Taxes	2.10%	1.70%	0.60%
Effective Income Tax Rate Reconciliation, Tax Credits, Foreign	(5.50%)	(3.80%)	(3.90%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential	(7.00%)	(2.70%)	(4.10%)
Effective Income Tax Rate Reconciliation, Tax Contingencies	(0.60%)	0.90%	2.20%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance	(2.70%)	(3.50%)	1.30%
Effective Income Tax Rate Reconciliation, Other Adjustments	(2.00%)	(5.20%)	(1.80%)
Effective Income Tax Rate, Continuing Operations	19.30%	22.40%	29.30%