Summary Of Significant Accounting Policies Summary of Significant Accounting Policies (Cash Flow, Supplemental Disclosures) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Increase (Decrease) in Restricted Cash		$ 0.0	$ 0.0
Net Cash Provided by (Used in) Investing Activities	$ (1,238.3)	(871.8)	(878.2)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	65.5	24.5	65.6
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 329.3	263.8	239.3	$ 173.7
Restatement Adjustment [Member]
Increase (Decrease) in Restricted Cash		31.0	57.0
Net Cash Provided by (Used in) Investing Activities		30.9	57.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		30.9	57.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		255.6	224.7	167.4
Previously Reported [Member]
Increase (Decrease) in Restricted Cash		(31.0)	(57.0)
Net Cash Provided by (Used in) Investing Activities		(902.7)	(935.5)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect		(6.4)	8.3
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents		$ 8.2	$ 14.6	$ 6.3

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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