Revenue - Contracts and Liabilities (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Contract With Customer, Asset [Roll Forward]
Contract assets, December 31, 2023	$ 21.5
Contract assets, September 30, 2024	42.3
Change in contract assets - increase (decrease)	20.8
Contract With Customer, Liability [Roll Forward]
Deferred income, December 31, 2023	(53.9)
Deferred income, September 30, 2024	(53.8)
Change in deferred income - decrease (increase)	$ 0.1