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Supplemental Financial Information (Other Assets, Net) (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Supplemental Financial Information [Abstract] |  |
Tax receivables | $ 65.5 | $ 36.3
Right-of-use assets | 41.6 | 58.1
Deferred Income Tax Assets, Net | 42.9 | 26.6
Supplemental executive retirement plan assets | 21.9 | 26.0
Intangible assets | 3.1 | 11.9
Other | 25.2 | 29.4
Other assets, net | $ 200.2 | $ 188.3

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