Leases - Cash flow information, weighted average remaining term and discount rate (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 193.4	$ 185.5
Right-of-use assets disposed in exchange for operating lease liabilities	$ 36.2	$ 112.3
Weighted-average remaining lease term - operating leases	25 years		25 years
Weighted-average discount rate - operating leases	6.60%		6.50%