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Fair Value Disclosures - Narrative (Details) - Level 3
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Percent of level three fair value assets and liabilities 33.00% 32.00%
Financial instruments level three percent 71.00% 73.00%