XML 54 R38.htm IDEA: XBRL DOCUMENT
v3.22.4

Interest Cost Components (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Debt Disclosure [Abstract] |
Schedule of Interest Cost Components |
For the year ended December 31, | 2022 |  | 2021 |  | 2020
Amount charged to interest expense, net | $ | 229 |  |  | $ | 259 |  |  | $ | 317 |
Loss on debt redemption (R) | 2 |  |  | 146 |  |  | 64 |
Amount capitalized | 6 |  |  | 8 |  |  | 11 |
Total | $ | 237 |  |  | $ | 413 |  |  | $ | 392 |

X
- Definition Schedule of Interest Cost Components + References No definition available. + Details
Name: | hwm_ScheduleOfInterestCostComponentsTableTextBlock
Namespace Prefix: | hwm_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration