Commitments and Credit Risk (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Other Commitments [Line Items]
Loan commitments	$ 276.9	$ 263.9
Capital Addition Purchase Commitments
Other Commitments [Line Items]
Other contract commitment	66.7
Construction related contract commitment, not yet incurred	$ 20.4
Construction related contract commitment, term	12 months

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant