Revenue - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Net revenue recognized from performance obligations satisfied in previous periods			$ 102
Remaining performance obligations	$ 4,675		4,675
Revenue	2,188	$ 2,216	4,291	$ 4,371
Allowance for credit losses	68		68		$ 67
Royalty Revenue [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue	19	$ 17	38	$ 33
Receivables allowances for credit losses	139		139
Net of related allowances for credit losses	44		44
Receivable remaining allowance for Credit Loss	$ 11		$ 11

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

NOV Inc. 10-Q