Employee Benefit Plans - Schedule of Assumptions Used for Net Periodic Cost (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	2.34%	3.43%	2.99%
Expected long-term return on plan assets	4.20%	5.48%	5.94%
Interest crediting rate	2.60%	3.15%	2.60%
Other Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate	2.35%	3.92%	3.32%