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Held for Sale and Discontinued Operations (Cash Flows Table) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net cash provided from discontinued operations (See Note 20) $ 0.0 $ 0.0 $ 157.0
Net cash provided from investing activities — discontinued operations (See Note 20) 0.0 0.0 3.0
Net cash used for financing activities — discontinued operations (See Note 20) 0.0 0.0 (61.9)
Net change in cash during the period     98.1
Cash balance at beginning of year 110.3 97.1 80.2
Net change in cash during the period - continuing operations     (0.9)
Cash sold as part of sale of consolidated subsidiaries     (167.7)
Cash balance at end of year $ 161.0 110.3 97.1
Discontinued Operations      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Cash balance at beginning of year   $ 0.0 70.5
Cash balance at end of year     $ 0.0