Leases - Cash flow information, weighted average remaining term and discount rate (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 129.3	$ 122.5
Right-of-use assets disposed in exchange for operating lease liabilities	$ (4.4)	$ 82.2
Weighted-average remaining lease term - operating leases	25 years		25 years
Weighted-average discount rate - operating leases	6.50%		6.50%