Benefit Plans - Summary of Weighted Average Assumptions (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Discount rate for obligations	8.75%	10.50%	9.25%
Discount rate for net periodic benefit costs	10.50%	9.25%	8.50%
Rate of compensation increases	4.50%	4.50%	4.50%