Guarantees (Details) $ in Millions	Dec. 31, 2021 USD ($)
Guarantor Obligations
Total guarantees	$ 97.4
Guarantees expiring in less than one year	15.3
Guarantees expiring within one to three years	0.2
Guarantees with expiration over three years	81.9
Standby letters of credit (1)
Guarantor Obligations
Total guarantees	75.2
Guarantees expiring in less than one year	2.5
Guarantees expiring within one to three years	0.2
Guarantees with expiration over three years	72.5
Surety bonds (2)
Guarantor Obligations
Total guarantees	12.8
Guarantees expiring in less than one year	12.8
Guarantees expiring within one to three years	0.0
Guarantees with expiration over three years	0.0
Other guarantees (3)
Guarantor Obligations
Total guarantees	9.4
Guarantees expiring in less than one year	0.0
Guarantees expiring within one to three years	0.0
Guarantees with expiration over three years	9.4
Liabilities related to workers compensation coverage
Guarantor Obligations
Total guarantees	$ 9.4