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Supplemental Financial Information (Cash Flows Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Financial Information [Abstract]
(Increase) decrease in accounts receivable	$ 29.5	$ (6.2)	$ 83.2
(Increase) decrease in other assets	(32.0)	(2.8)	(14.0)
(Decrease) increase in liabilities	(25.4)	2.7	3.2
Changes in operating assets and liabilities	$ (27.9)	$ (6.3)	$ 72.4

X

- Definition

The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.

+ 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 (a)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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- Definition

Amount of increase (decrease) in operating assets classified as other.

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Amount of increase (decrease) in operating liabilities classified as other.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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Supplemental Financial Information [Abstract]

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No definition available.

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