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Significant Accounting Policies Schedule of Fee by Series and Share Class (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 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% |

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