Pension and Other Post-Retirement Benefit Plans - Schedule of Unfunded Amounts Recognized on Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jan. 02, 2026	Jun. 27, 2025
Retirement Benefits [Abstract]
Current liabilities (included in Accrued expenses)	$ 1	$ 1
Non-current liabilities (included in Other liabilities)	77	67
Net amount recognized	$ 78	$ 68

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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