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Revenue and Contracts with Customers (Contract with Customer Asset and Liability) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
Deferred revenue | $ 189.8 | $ 252.4
Deferred revenue – change | (62.6) |
Contract With Customer, Advances, Liability, Current | 32.8 | 30.2
Advances from customers, current | 2.6 |
Deferred Revenue, Noncurrent | 0.0 | $ 32.8
Advances from customers, noncurrent - change | $ (32.8) |

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