Employee Benefit Plans - Investment of Plan Assets (Details)	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	25.00%	22.00%
International equity securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	31.00%	24.00%
U.S. fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	19.00%	13.00%
International fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	21.00%	36.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	4.00%	5.00%