Organization and Basis of Presentation (Details) $ in Billions	Jun. 09, 2025 shares	Feb. 21, 2025 USD ($) shares	Oct. 03, 2025 shares	Feb. 22, 2025 shares
Western Digital Corporation
Noncontrolling Interest [Line Items]
Dividends paid | $		$ 1.5
Revolving Credit Facility | Line of Credit
Noncontrolling Interest [Line Items]
Maximum borrowing capacity | $		1.5
Term B Loan | Line of Credit
Noncontrolling Interest [Line Items]
Maximum borrowing capacity | $		$ 2.0
Western Digital Corporation
Noncontrolling Interest [Line Items]
Distribution of shares (in shares) | shares		116,035,464
Percent distribution of shares		80.10%
Right to receive per share ratio		0.33
Western Digital Corporation | Sandisk Corporation
Noncontrolling Interest [Line Items]
Number of shares sold (in shares) | shares	21,314,768
Percentage disposed	14.60%
Western Digital Corporation | Sandisk Corporation
Noncontrolling Interest [Line Items]
Investment (in shares) | shares			7,513,019	28,827,787
Ownership percentage			5.10%	19.90%