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Pending Business Combination - Additional Information - Narrative (Details) - USD ($)
$ in Billions
Jul. 27, 2017
Jul. 25, 2017
Business Acquisition [Line Items]    
Business Acquisition, Number Of Shares Received by Acquiree 1.3875  
Business Combination, Consideration Transferred $ 1.0  
Business Acqusitions, Percentage of Voting Interests Retained   65.00%
Business Acquisition, Percentage of Voting Interests Acquired   35.00%