Derivative Instruments and Hedging Activities (Policies) |
6 Months Ended |
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Jun. 30, 2018 | |
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. |