Investment in the Master Trust - Change In Net Assets of Master Trust (Details) - EBP 020 $ in Thousands |
12 Months Ended |
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Dec. 31, 2025
USD ($)
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| EBP, Master Trust [Line Items] | |
| Appreciation in fair value of investments | $ 118,795 |
| Total investment income | 164,321 |
| Net transfers out | 12 |
| Net assets available for benefits, beginning of year | 885,360 |
| Net assets available for benefits, end of year | 1,032,926 |
| Master Trust | |
| EBP, Master Trust [Line Items] | |
| Total investment income | 35,026 |
| Net transfers out | (22,130) |
| Net increase in net assets available for benefits | 12,896 |
| Net assets available for benefits, beginning of year | 90,883 |
| Net assets available for benefits, end of year | 103,779 |
| Master Trust | Carpenter Technology Stock Fund | |
| EBP, Master Trust [Line Items] | |
| Appreciation in fair value of investments | 33,578 |
| Interest and dividends | 186 |
| Master Trust | Insight Investment Stable Value Fund | |
| EBP, Master Trust [Line Items] | |
| Interest and dividends | $ 1,262 |
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- Definition EBP, Change in Net Asset Available for Benefit, Increase (Decrease), After Transfer To (From) Plan No definition available.
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- Definition Amount of increase (decrease) in net asset available for benefit from realized and unrealized gain (loss) on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase (decrease) in net asset available for benefit from income (loss) on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, realized and unrealized gain (loss) on investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of increase in net asset available for benefit from interest and dividend income on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of net asset available for benefit transferred to (from) employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from (to) external plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- 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
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- Definition Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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