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Supplemental Financial Information Schedule of Revenue by Major Customers, by Reporting Segments (Details) - Revenue Benchmark [Member] - Customer Concentration Risk	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	100.00%	100.00%
Total S.A.
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	16.00%	18.00%
Saudi Aramco
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	10.00%	13.00%
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	74.00%	69.00%
Floaters | Total S.A.
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage	89.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

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No definition available.

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