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Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Sep. 30, 2025
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	48
Floaters
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	15
Jackups
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	26
Europe
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	17
Europe | Floaters
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	6
Europe | Jackups
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	11
Europe | Other
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0
Europe | ARO
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0
Middle East & Africa
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	16
Middle East & Africa | Floaters
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	2
Middle East & Africa | Jackups
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	7
Middle East & Africa | Other
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	7
Middle East & Africa | ARO
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	9
North & South America
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	10
North & South America | Floaters
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	5
North & South America | Jackups
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	5
North & South America | Other
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0
North & South America | ARO
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0
Asia & Pacific Rim
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	5
Asia & Pacific Rim | Floaters
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	2
Asia & Pacific Rim | Jackups
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	3
Asia & Pacific Rim | Other
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0
Asia & Pacific Rim | ARO
Segment Reporting Information [Line Items]
Total Number Of Contract Drilling Rigs	0

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- Definition

Total Number Of Contract Drilling Rigs, Owned

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