Segments and Geographic Area Analysis - Summary of Information about Disaggregated Revenue by Equipment-type and Country (Detail) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 23, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 169,379	$ 556,066	$ 1,056,179	$ 841,278
Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	153,364	465,328	983,983	724,744
Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	16,015	90,738	72,196	116,534
United States [Member]
Segment Reporting Information [Line Items]
Total revenues	100,263	250,383	549,871	397,090
United States [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	93,215	194,912	513,226	322,021
United States [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	7,048	55,471	36,645	75,069
Australia [Member]
Segment Reporting Information [Line Items]
Total revenues	21,728	110,733	77,103	107,021
Australia [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	17,031	95,601	67,846	92,939
Australia [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	4,697	15,132	9,257	14,082
United Kingdom [Member]
Segment Reporting Information [Line Items]
Total revenues	30,267	59,104	183,602	74,594
United Kingdom [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	27,967	55,245	168,894	66,116
United Kingdom [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	2,300	3,859	14,708	8,478
Senegal [Member]
Segment Reporting Information [Line Items]
Total revenues		58,868	180,809	166,503
Senegal [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues		48,758	169,223	154,574
Senegal [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues		10,110	11,586	11,929
Brazil [Member]
Segment Reporting Information [Line Items]
Total revenues	3,421	42,215	64,794	80,185
Brazil [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	3,421	42,215	$ 64,794	80,185
Myanmar [Member]
Segment Reporting Information [Line Items]
Total revenues	13,700	34,763		15,885
Myanmar [Member] | Contract Drilling [Member]
Segment Reporting Information [Line Items]
Total revenues	11,730	28,597		8,909
Myanmar [Member] | Reimbursable Expenses [Member]
Segment Reporting Information [Line Items]
Total revenues	$ 1,970	$ 6,166		$ 6,976