{"cik":1599617,"taxonomy":"us-gaap","tag":"LongTermDebt","label":"Long-term Debt","description":"Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.","entityName":"DNOW INC.","units":{"USD":[{"end":"2024-12-31","val":0,"accn":"0001193125-26-072828","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-26","frame":"CY2024Q4I"},{"end":"2025-12-31","val":411000000,"accn":"0001193125-26-072828","fy":2025,"fp":"FY","form":"10-K","filed":"2026-02-26"},{"end":"2025-12-31","val":411000000,"accn":"0001193125-26-211564","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-07"},{"end":"2025-12-31","val":411000000,"accn":"0001193125-26-338381","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2025Q4I"},{"end":"2026-03-31","val":571000000,"accn":"0001193125-26-211564","fy":2026,"fp":"Q1","form":"10-Q","filed":"2026-05-07","frame":"CY2026Q1I"},{"end":"2026-06-30","val":474000000,"accn":"0001193125-26-338381","fy":2026,"fp":"Q2","form":"10-Q","filed":"2026-08-06","frame":"CY2026Q2I"}]}}