Significant Accounting Policies Schedule of Fee by Series and Share Class (Details)	3 Months Ended	6 Months Ended		12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2015
Class A [Member]
Revenue Recognition Principal Transaction [Line Items]
Rate of Administrative Service Fees	0.24%			0.24%
Class C [Member]
Revenue Recognition Principal Transaction [Line Items]
Rate of Administrative Service Fees	0.24%			0.24%
Class Y [Member]
Revenue Recognition Principal Transaction [Line Items]
Rate of Administrative Service Fees	0.10%			0.10%
Class I [Member]
Revenue Recognition Principal Transaction [Line Items]
Rate of Administrative Service Fees	0.20%	0.21%	0.24%