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Supplemental Financial Information (Accrued Liabilities) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Supplemental Financial Information [Abstract] |  |
Accrued interest | $ 157.2 | $ 115.2
Personnel costs | 97.9 | 134.4
Income and other taxes payable | 65.9 | 61.2
Deferred revenue | 31.5 | 30.0
Operating Lease, Liability, Current | 16.8 | 21.1
Derivative Liability, Current | 4.2 | 0.9
Other Accrued Liabilities, Current | 0.0 | 20.3
Other | 24.6 | 34.6
Accrued liabilities and other | $ 398.1 | $ 417.7

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