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Balance Sheet Information (Fair value and amortized cost of available-for-sale securities by contractual maturity) (Details) (USD $)
In Millions, unless otherwise specified |
Apr. 03, 2015
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|---|---|
| Amortized Cost | |
| Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Basis | $ 2,190 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortize | 6 |
| AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost | 0 |
| Total Amortized Cost | 2,196 |
| Fair Value | |
| Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value | 2,190 |
| Available-for-sale Securities, Debt Maturities, after One Through Five Years, at Fair Value | 6 |
| Available-for-sale Securities, Debt Maturities, after Five Years Fair Value | 0 |
| Total Fair Value | $ 2,196 |