Partnership Capital Subject to Mandatory Redemption - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions |
Sep. 25, 2026 |
Dec. 31, 2025 |
Sep. 26, 2025 |
|---|---|---|---|
| Partners' Capital Notes [Abstract] | |||
| Partnership loans outstanding | $ 424 | $ 495 | $ 473 |
| Partnership loans outstanding | $ (12) | $ (424) | $ (495) |