XML 67 R26.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Other Assets and Other Liabilities | 12 Months Ended
--- | ---
Dec. 31, 2024
Other Assets and Other Liabilities [Abstract] |
Other Assets and Other Liabilities | Other Assets and Other Liabilities The following table shows the components of other assets reported on our balance sheets as of December 31 (in millions):
| 2024 |  | 2023
Inventory | $ | 71.8 |  |  | $ | 74.0 |
Office furniture, fixtures and other equipment, net of accumulated depreciation | 26.8 |  |  | 28.5 |
Utilization asset | 26.5 |  |  | 24.1 |
Prepaid pension | 20.7 |  |  | 14.0 |
Prepaid items | 18.4 |  |  | 14.3 |
Deferred financing costs | 3.5 |  |  | 2.0 |
Assets held for sale | 0.4 |  |  | 0.8 |
Derivatives | — |  |  | 0.5 |
Other | 135.0 |  |  | 128.4 |
Total | $ | 303.1 |  |  | $ | 286.6 |
The following table shows the components of other liabilities reported on our balance sheets as of December 31 (in millions):
| 2024 |  | 2023
Accrued pension and other post-retirement benefits | $ | 38.5 |  |  | $ | 47.0 |
Derivatives | 12.1 |  |  | 18.5 |
Environmental accruals | 12.0 |  |  | 2.8 |
Other | 44.9 |  |  | 38.1 |
Total | $ | 107.5 |  |  | $ | 106.4 |

X
- Definition Other assets and other liabilities abstract. + References No definition available. + Details
Name: | gmt_OtherAssetsAndOtherLiabilitiesAbstract
Namespace Prefix: | gmt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other assets and other liabilities. + References No definition available. + Details
Name: | gmt_OtherAssetsAndOtherLiabilitiesTextBlock
Namespace Prefix: | gmt_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration