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Segment Information (Schedule Of Geographic Distribution Of Rigs By Segment) (Details)	Dec. 31, 2023 rigs
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	53
Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	18
Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	27
Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8
ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8
North & South America (Excluding Brazil) [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	16
North & South America (Excluding Brazil) [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	9
North & South America (Excluding Brazil) [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	7
North & South America (Excluding Brazil) [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
North & South America (Excluding Brazil) [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Europe & Mediterranean [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	16
Europe & Mediterranean [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	4
Europe & Mediterranean [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	12
Europe & Mediterranean [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Europe & Mediterranean [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	5
Asia Pacific [Member] | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	2
Asia Pacific [Member] | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	3
Asia Pacific [Member] | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Asia Pacific [Member] | ARO
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	0
Middle East and Africa
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	16
Middle East and Africa | Floaters [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	3
Middle East and Africa | Jackups [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	5
Middle East and Africa | Other [Member]
Segment Reporting Information [Line Items]
Total number of contract drilling rigs	8

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Total Number Of Contract Drilling Rigs

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