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Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
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Supplemental Financial Information [Abstract] |  |
Other Deferred Costs, Net | $ 62.1 | $ 26.9
Prepaid taxes | 47.2 | 44.4
Prepaid expenses | 26.5 | 23.1
Other | 27.1 | 23.4
Other current assets | $ 162.9 | $ 117.8

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