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v3.21.2

Revenues, Unbilled Revenue and Deferred Revenue (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Contracts with Customers, Assets and Liabilities [Abstract] |  |
Unbilled revenue | $ 164.9 | $ 18.8
Deferred revenue | 403.4 | $ 343.5
Prepaid and other current assets [Member] |  |
Contracts with Customers, Assets and Liabilities [Abstract] |  |
Unbilled revenue (current amount) | 164.9 |
Other current liabilities [Member] |  |
Contracts with Customers, Assets and Liabilities [Abstract] |  |
Deferred revenue (current amount) | 164.9 |
Other long-term liabilities [Member] |  |
Contracts with Customers, Assets and Liabilities [Abstract] |  |
Deferred revenue (noncurrent) | $ 238.5 |

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