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Supplemental Financial Information (Cash Flows Information) (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Supplemental Financial Information [Abstract]
(Increase) decrease in accounts receivable	$ 23.2	$ (18.3)	$ 53.3	$ 29.5
(Increase) decrease in other assets	27.3	(48.4)	(63.8)	(56.6)
(Decrease) increase in liabilities	18.0	77.0	(11.5)	(25.4)
Changes in operating assets and liabilities	$ 68.5	$ 10.3	$ (22.0)	$ (52.5)

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=123570139&loc=d3e3602-108585

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- Definition

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

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-Publisher FASB
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-Section 45
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Amount of increase (decrease) in operating assets after deduction of operating liabilities classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Paragraph 28
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- Definition

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

+ References

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

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No definition available.

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