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Supplemental Financial Information (Other Current Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2021
Supplemental Financial Information [Abstract]
Prepaid taxes	$ 44.6	$ 44.4
Deferred mobilization costs	59.1	26.9
Prepaid expenses	17.5	23.1
Other	27.4	23.4
Other	$ 148.6	$ 117.8	$ 90.5

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Amount of current assets classified as other.

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Net amount of other deferred costs capitalized at the end of the reporting period. Does not include deferred finance costs or deferred acquisition costs of insurance companies.

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Amount of asset related to consideration paid in advance for other costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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