Fair Value (Quantitative Information) (Details) - Measurement Input, Entity Credit Risk [Member] - Interest Rate Contract |
12 Months Ended |
---|---|
Dec. 31, 2018 | |
Minimum | |
Fair Value Inputs Quantitative Information [Line Items] | |
Fair Value Measurement Inputs, Nonrecurring | 2.00% |
Maximum | |
Fair Value Inputs Quantitative Information [Line Items] | |
Fair Value Measurement Inputs, Nonrecurring | 5.00% |
Weighted Average | |
Fair Value Inputs Quantitative Information [Line Items] | |
Fair Value Measurement Inputs, Nonrecurring | 4.00% |