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Derivative Instruments and Hedging Activities (Policies)
6 Months Ended
Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives, Offsetting Fair Value Amounts, Policy
Net derivative positions on the balance sheets are not offset against the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) under master netting arrangements.