Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 248	$ 129	$ 5
Other comprehensive income :
Foreign currency translation adjustments	5	(3)	(2)
Comprehensive income	253	126	3
Comprehensive income attributable to noncontrolling interest	1	1	0
Comprehensive income attributable to DNOW Inc.	$ 252	$ 125	$ 3