Guarantees (Details 2)	Jun. 30, 2022 USD ($)
Guarantor Obligations [Line Items]
Guarantor obligations, maximum exposure, undiscounted	$ 276,000,000
Fixed maximum amounts guaranteed by year 2022	21,800,000
Fixed maximum amounts guaranteed by year 2023	82,000,000
Fixed maximum amounts guaranteed by year 2024	160,600,000
Fixed maximum amounts guaranteed by year 2025	900,000
Fixed maximum amounts guaranteed by year 2026	900,000
Fixed maximum amounts guaranteed, thereafter	800,000
No scheduled maturity date	9,000,000
Amount outstanding under guarantees that is reflected on balance sheet	0
Letters of credit	28,200,000
Letters of credit set to expire - 2022	27,600,000
Letters of credit set to expire - 2023	600,000
Outstanding letters of credit	0
Amount of surety bonds outstanding	$ 1,200,000,000