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Stock-Based Compensation - Additional Information (Detail) |  | 3 Months Ended
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Feb. 23, 2023 $ / shares shares | Mar. 31, 2023 USD ($) Installment shares | Mar. 31, 2022 USD ($)
2018 Plan [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock-based compensation expense | $ |  | $ 15,000,000 | $ 16,000,000
2018 Plan [Member] | Stock Options [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Stock options granted | 1,014,002 |  |
Weighted average grant-date fair value of options | $ / shares | $ 9.75 |  |
Weighted average exercise price per share of options | $ / shares | $ 21.76 |  |
2018 Plan [Member] | Restricted Stock and Restricted Stock Units [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Shares granted | 2,228,226 |  |
Restricted stock granted fair value | $ / shares | $ 21.76 |  |
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. |
Number of equal annual vesting installments | Installment |  | 3 |
2018 Plan [Member] | 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 |
2018 Plan [Member] | Performance-base restricted stock [Member] | Minimum [Member] | Senior Management Employees [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Shares granted | 0 |  |
2018 Plan [Member] | Performance-base restricted stock [Member] | Maximum [Member] | Senior Management Employees [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Shares granted | 960,478 |  |
2018 Plan [Member] | 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. |
2018 Plan [Member] | TSR [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Percentage of performance shares awarded |  | 85.00% |
2018 Plan [Member] | NVA [Member] |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |
Percentage of performance shares awarded |  | 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 |  | 12,800,000 |
Income tax benefit recognized | $ |  | $ 0 | $ 0

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