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Leases Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Operating lease right-of-use assets	$ 64.9	$ 0.0
Current lease liability	23.4	0.0
Long-term lease liability	53.5	$ 0.0
Total operating lease liabilities	$ 76.9
Weighted-average remaining lease term (in years)	5 years 1 month 6 days
Weighted-average discount rate	8.18%
Rowan Companies
Operating Leased Assets [Line Items]
Operating lease right-of-use assets	$ 12.2
Current lease liability	3.9
Long-term lease liability	$ 10.6

X

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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-Publisher FASB
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-SubTopic 20
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- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

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Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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