Segments and Geographic Area Analysis - Long-Lived Tangible Assets by Country (Parenthetical) (Detail) - USD ($) $ in Thousands	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 23, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Fair value adjustment to drilling and other property and equipment net of accumulated depreciation	$ (2,712,100)
Fair value adjustment of BOP finance lease assets	(8,400)
Impairment of assets	$ 197,027	$ 132,449	$ 0		$ 842,016
Other Countries [Member] | Drilling and Other Property and Equipment , Net of Accumulated Depreciation [Member] | Maximum [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage				5.00%