Leases - Cash flow information, weighted average remaining term and discount rate (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 122.5	$ 124.6
Right-of-use assets obtained in exchange for operating lease liabilities	$ 82.2	$ 64.2
Weighted-average remaining lease term - operating leases	25 years		25 years
Weighted-average discount rate - operating leases	6.60%		6.70%