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Summary of Significant Accounting Policies:New and Recently Adopted Accounting Standards (Details) - Subsequent Event [Member] - Accounting Standards Update 2016-02 [Member]
$ in Millions
Jan. 01, 2019
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Operating Lease, Liability $ 72
Operating Lease, Right-of-Use Asset $ 69