Commitments and Contingencies, Guarantees (Details) $ in Millions	Dec. 31, 2019 USD ($)	[1]
Guarantee [Abstract]
Current exposure under these guarantees	$ 0.0
Payment or Performance Guarantee | Customer Loans for Farm Rewiring Program
Guarantee [Abstract]
Guarantees issued and outstanding	$ 1.0

[1] The term of this guarantee expires in 2020, which is the final scheduled repayment date for the loans. As of Dec. 31, 2019, no claims had been made by the lender.