Revenue Recognition - Contract assets and liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Revenue from Contract with Customer [Abstract]
Contract assets, current (included in accounts receivable, net)	$ 37.2	$ 43.3
Total contract assets	37.2	43.3
Contract liabilities, current (included in customer deposits and deferred revenue)	(140.3)	(128.3)
Contract liabilities, long-term (included in other long-term liabilities)	(11.2)	(13.3)
Total contract liabilities	(151.5)	(141.6)
Net contract assets (liabilities)	$ (114.3)	$ (98.3)