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Discontinued Operations - Economic Hedge (Details) - USD ($)
$ in Millions
1 Months Ended
Feb. 25, 2017
Jul. 01, 2017
Maximum    
Derivative Instruments, Gain (Loss) [Line Items]    
Business sale length of contract for certain services 2 years  
Equity Contract | Designated as Hedging Instrument | Fair Value Hedging    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, Notional Amount   $ 247