Nature of Operations and Significant Accounting Policies (Schedule Of Changes To Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounting Policies [Abstract]
Intangible assets, net	$ 520.3	$ 505.1	$ 481.8	$ 276.8
Indefinite-lived Intangible Assets Acquired	52.5	66.0	252.8
Amortization expense	(48.4)	(40.0)	(44.5)
Finite-Lived Intangible Assets, Translation Adjustments	11.1	(2.7)	$ (3.3)
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	44.4
2022	43.9
Finite-Lived Intangible Assets, Amortization Expense, Year Three	43.8
2024	42.9
2025 and after	274.4
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 70.9	$ 69.9

Finite-Lived Intangible Assets, Amortization Expense, After Year Four

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- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life or definite life, from an acquisition.

+ References

No definition available.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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