Employee Benefit Plans - Asset Allocation Ranges (Details)	Dec. 31, 2019
Minimum | Cash
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	0.00%
Minimum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	15.00%
Minimum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	30.00%
Maximum | Cash
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	10.00%
Maximum | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	75.00%
Maximum | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Asset allocation percentage	80.00%