Subsequent Event - Summary of Investments Purchased (Detail) - USD ($) $ in Thousands |
Jan. 01, 2022 |
Dec. 31, 2021 |
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|---|---|---|---|---|
| Subsequent Event [Line Items] | ||||
| Share Amount | [1] | 34,996 | ||
| Investment Amount | [1] | $ 326,000 | ||
| Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Share Amount | 5,350,000 | |||
| Investment Amount | $ 43,500 | |||
| Fast Radius, Inc [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Share Amount | 2,000,000 | |||
| Investment Amount | $ 20,000 | |||
| Energy Vault Inc [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Share Amount | 850,000 | |||
| Investment Amount | $ 8,500 | |||
| Tritium [Member] | Subsequent Event [Member] | ||||
| Subsequent Event [Line Items] | ||||
| Share Amount | 2,500,000 | |||
| Investment Amount | $ 15,000 | |||
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