Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Summary of Unaudited Pro Forma Information (Detail)

v3.6.0.2
Our Portfolio - Summary of Unaudited Pro Forma Information (Detail) - American Wind Capital Company, LLC ("AWCC") [Member]
$ in Millions
12 Months Ended
Dec. 31, 2014
USD ($)
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]  
Pro forma total revenue $ 32
Pro forma net income (loss) $ 12