Basis of Presentation - Additional Information (Detail) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Change in accounting principle, accounting standards update, adopted [true false] | true | ||
| Change in accounting principle, accounting standards update adoption date | Jan. 01, 2026 | ||
| Change in accounting principle, accounting standards update, immaterial effect [true false] | true | ||
| Equity method investment Contribution | $ 44.7 | $ 412.5 | |
| Contributions to joint venture | $ 44.7 | ||
| Equity Method Investments | $ 367.6 | $ 379.4 | |
| PACCAR | |||
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Equity method investment, ownership percentage | 30.00% | ||
| Maximum | |||
| New Accounting Pronouncements Or Change In Accounting Principle [Line Items] | |||
| Equity method investment Contribution | $ 830.0 |
| X | ||||||||||
- Definition Indicates (true false) whether accounting standards update was adopted. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Date accounting standards update was adopted, in YYYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Indicates (true false) whether effect from applying amendment to accounting standards is immaterial. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|