Lease assets and liabilities, lessee (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 1,553.8	$ 1,521.5
Short-term operating lease liabilities	179.5	172.9
Non-current operating lease liabilities	$ 1,398.9	$ 1,374.7
Weighted-average remaining lease term	10 years 10 months 24 days	10 years 9 months 18 days
Weighted-average discount rate	6.40%	6.40%