Leases (Reported in Balance Sheet) (Details) - USD ($) $ in Millions	Jan. 26, 2025	Jul. 28, 2024
Operating Lease, Right-of-Use Asset	$ 335	$ 333
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Operating Lease, Liability, Current	$ 93	$ 90
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued liabilities	Accrued liabilities
Operating Lease, Liability, Noncurrent	$ 271	$ 268
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Finance Lease, Right-of-Use Asset	$ 71	$ 72
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Plant assets, net of depreciation	Plant assets, net of depreciation
Finance Lease, Liability, Current	$ 30	$ 25
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Short-term borrowings	Short-term borrowings
Finance Lease, Liability, Noncurrent	$ 44	$ 46
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-Term Debt and Lease Obligation	Long-Term Debt and Lease Obligation
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | noosa yoghurt
Operating Lease, Right-of-Use Asset	$ 2	$ 0
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Assets of business held for sale	Assets of business held for sale
Operating Lease, Liability, Noncurrent	$ 2	$ 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Liabilities of business held for sale	Liabilities of business held for sale
Finance Lease, Right-of-Use Asset	$ 12	$ 0
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Assets of business held for sale	Assets of business held for sale
Finance Lease, Liability, Noncurrent	$ 9	$ 0
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Liabilities of business held for sale	Liabilities of business held for sale