Contingencies - Guarantees (Details)	Jun. 30, 2024 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Guarantor obligations, maximum exposure, undiscounted	$ 320,000,000
Fixed maximum amounts guaranteed by year 2024	28,700,000
Fixed maximum amounts guaranteed by year 2025	187,400,000
Fixed maximum amounts guaranteed by year 2026	82,900,000
Fixed maximum amounts guaranteed by year 2027	19,600,000
Fixed maximum amounts guaranteed by year 2028	1,000,000
Fixed maximum amounts guaranteed, thereafter	400,000
Amount outstanding under guarantees that is reflected on balance sheet	0
Letters of credit	14,300,000
Letters of credit set to expire - 2023	12,300,000
Letters of credit set to expire - 2025	2,000,000
Outstanding letters of credit	0
Amount of surety bonds outstanding	$ 504,100,000