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Guarantor Financial Information - Narrative (Details) - USD ($) $ in Millions | Oct. 30, 2015 | Apr. 24, 2015
--- | --- | ---
Condensed Financial Statements, Captions [Line Items] |  |
Investment in subsidiaries | $ 0 | $ 0
Subsidiary Issuer [Member] | CIFSA Notes [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Investment in subsidiaries | $ 8,794 | 4,277
Subsidiary Issuer [Member] | CIFSA Notes [Member] | Restatement adjustment [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Investment in subsidiaries |  | 2,763
Subsidiary Issuer [Member] | CIFSA Notes [Member] | Restatement adjustment [Member] | Internal reorganization [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Investment in subsidiaries |  | 1,093
Subsidiary Issuer [Member] | CIFSA Notes [Member] | Restatement adjustment [Member] | Intercompany dividend [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Investment in subsidiaries |  | $ 1,670

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