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v3.6.0.2

Other Income, Net (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Other Income, net [Abstract] |  |  |
AFUDC - Equity | $ 25.1 | $ 20.1 | $ 5.6
Gain on repurchase of notes | 23.6 | 0.0 | 0.0
Gain on asset sales | 19.6 | 22.9 | 7.5
Other, net | 12.5 | 15.9 | 0.3
Other income, net | $ 80.8 | $ 58.9 | $ 13.4

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