Guarantees (Details 4)	Dec. 31, 2022 USD ($)
Guarantor Obligations [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 341,800,000
Fixed maximum amounts guaranteed by year 2023	51,300,000
Fixed maximum amounts guaranteed by year 2024	148,400,000
Fixed maximum amounts guaranteed by year 2025	126,800,000
Fixed maximum amounts guaranteed by year 2026	1,300,000
Fixed maximum amounts guaranteed by year 2027	800,000
Fixed maximum amounts guaranteed, thereafter	1,700,000
No scheduled maturity date	11,500,000
Amount outstanding under guarantees that is reflected on balance sheet	0
Letters of credit	30,000,000
Letters of credit set to expire - 2023	29,500,000
Letters of credit set to expire - 2024	500,000
Outstanding letters of credit	0
Amount of surety bonds outstanding	$ 1,300,000,000