Income Taxes Effective Tax Rate Reconciliation (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory income tax rate	19.30%	34.40%	19.30%	34.40%
Foreign earnings subject to different tax rates	10.80%	(14.20%)	9.40%	(17.90%)
Branch profits tax	0.50%		(1.40%)
Deemed dividends	0.40%		1.40%
State, local and provincial tax	2.60%	2.00%	5.10%	3.30%
Valuation allowance	12.90%	5.20%	13.90%	7.00%
Other	2.10%	(2.00%)	1.10%	(4.20%)
Effective tax rate	48.60%	25.40%	48.80%	22.60%