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Common Stock - Additional Information (Detail) $ / shares in Units, $ in Millions |  |  |  | 12 Months Ended
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May 17, 2023 $ / shares shares | Feb. 23, 2023 $ / shares shares | Dec. 20, 2017 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) Installment $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Number of common stock, authorized |  |  |  | 1,000,000,000 | 1,000,000,000 |
Number of preferred stock, authorized |  |  |  | 10,000,000 |  |
Common stock, par value | $ / shares |  |  |  | $ 0.01 | $ 0.01 |
Preferred stock, par value | $ / shares |  |  |  | $ 0.01 |  |
Preferred stock, shares issued |  |  |  | 0 |  |
Preferred stock, shares outstanding |  |  |  | 0 |  |
Aggregated cash dividends paid | $ |  |  |  | $ 79 | $ 78 | $ 20
Stock-based compensation expense | $ |  |  |  | 66 | 67 | 78
Income tax provision recognized | $ |  |  |  | $ 7 | $ 3 | $ 2
Earlier authorized shares under stock based compensation | shares |  |  |  | 69,400,000 |  |
Duration of performance-based restricted stock awards, vested |  |  |  | Options granted under our stock-based compensation plans generally vest over a three-year period starting one year from the date of grant and expire ten years from the date of grant. |  |
Weighted average grant-date fair value of options | $ / shares |  |  |  | $ 9.75 | $ 6.28 | $ 5.75
Total intrinsic value of options exercised | $ |  |  |  | $ 1 | $ 1 |
Stock option, Minimum Range | $ / shares |  |  |  | $ 15.00 |  |
Stock option, Maximum Range | $ / shares |  |  |  | $ 69.00 |  |
Total unrecognized compensation cost related to nonvested stock options | $ |  |  |  | $ 11 |  |
Compensation cost not yet recognized, period for recognition |  |  |  | 3 years |  |
Total fair value of stock options vested | $ |  |  |  | $ 9 | 10 | $ 12
Cash received from option exercises | $ |  |  |  | 4 | 2 | 0
Actual tax benefit (expense) from share based compensation | $ |  |  |  | $ 0 | $ 0 | $ 0
Stock options granted |  |  |  | 1,014,002 | 1,492,020 | 1,669,511
Weighted average exercise price per share of options | $ / shares |  |  |  | $ 21.76 | $ 16.73 | $ 15.00
Stock Appreciation Rights (SARs) [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Stock appreciation rights exchange percentage |  |  | 94.75% |  |  |
Cash payment of stock appreciation rights | $ |  |  | $ 14 |  |  |
Cash paid to settle SARs | $ |  |  |  | $ 0 |  |
Compensation cost recognized | $ |  |  |  | $ 0 | $ 0 | $ 0
Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant-date fair value of options | $ / shares |  |  | $ 8.47 |  |  |
Stock options granted |  |  | 3,613,707 |  |  |
Weighted average exercise price per share of options | $ / shares |  |  | $ 34.32 |  |  |
Restricted Stock and Restricted Stock Units [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Duration of performance-based restricted stock awards, vested |  |  |  | The restricted stock units vest in three equal annual installments commencing on the first anniversary of the grant date. |  |
Shares granted |  | 2,228,226 |  | 2,792,465 | 3,509,425 | 3,772,842
Restricted stock granted fair value | $ / shares |  | $ 21.76 |  | $ 22.70 | $ 17.67 | $ 15.03
Number of equal annual vesting installments | Installment |  |  |  | 3 |  |
Performance-base restricted stock [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Description of performance goal |  |  |  | The 2023 PSAs can be earned based on performance against two established goals over a three-year period |  |
Performance-base restricted stock [Member] | Senior Management Employees [Member] | Minimum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares granted |  | 0 |  |  |  |
Performance-base restricted stock [Member] | Senior Management Employees [Member] | Maximum [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares granted |  | 960,478 |  |  |  |
TSR Award [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Description of performance goal |  |  |  | 85% with a TSR (total shareholder return) goal and 15% with an internal NVA (“NOV Value Added”, a return on capital metric) goal. TSR performance is determined by comparing the Company’s TSR with the TSR of the members of the Philadelphia Stock Exchange’s Oil Services Sector Index (OSX) for the three-year performance period. The TSR portion of the performance share awards is subject to a vesting cap equal to 100% of Target Level if the Company’s absolute TSR is negative, regardless of relative TSR results. Conversely, if the Company’s absolute TSR is greater than 15% annualized over the three-year performance period the payout amount shall not be less than 50% of Target Level, regardless of relative TSR results. The NVA goal is based on the Company’s improvement in NVA from the beginning of the performance period until the end of the performance period. NVA is calculated as an amount equal to the Company’s (a) gross cash earnings less (b) average gross operating assets times an amount equal to a required return on assets, with certain adjustments. |  |
Restricted Stock Awards [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Total unrecognized compensation cost related to nonvested stock options | $ |  |  |  | $ 68 |  |
Compensation cost not yet recognized, period for recognition |  |  |  | 2 years |  |
TSR [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Percentage of performance shares awarded |  |  |  | 85.00% |  |
NVA [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Percentage of performance shares awarded |  |  |  | 15.00% |  |
2018 Plan [Member] | Stock Options [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Weighted average grant-date fair value of options | $ / shares |  | $ 9.75 |  |  |  |
Stock options granted |  | 1,014,002 |  |  |  |
Weighted average exercise price per share of options | $ / shares |  | $ 21.76 |  |  |  |
2018 Plan [Member] | Restricted Stock Awards [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Shares granted | 84,000 |  |  |  |  |
Restricted stock granted fair value | $ / shares | $ 15.00 |  |  |  |  |
NOV Plan [Member] |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |
Authorized shares under stock based compensation |  |  |  | 55,700,000 |  |
Remaining shares available for future grants under the Plan |  |  |  | 12,900,000 |  |

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