Fair Value Measurements - Schedule of Fair Value of Investment Assets (Details) - USD ($) $ in Millions	Jun. 24, 2016	Dec. 25, 2015
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized cost basis of investments	$ 335	$ 920
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	337	919
Certificates of Deposit and Commercial Paper \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	260	810
Corporate Bonds \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	61	73
Government Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	16	32
Auction Rate Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	4
Level 1 \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 \| Certificates of Deposit and Commercial Paper \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 \| Corporate Bonds \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 \| Government Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 \| Auction Rate Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 2 \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	337	915
Level 2 \| Certificates of Deposit and Commercial Paper \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	260	810
Level 2 \| Corporate Bonds \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	61	73
Level 2 \| Government Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	16	32
Level 2 \| Auction Rate Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	0
Level 3 \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	4
Level 3 \| Certificates of Deposit and Commercial Paper \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	0
Level 3 \| Corporate Bonds \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	0
Level 3 \| Government Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	0	0
Level 3 \| Auction Rate Securities \| Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments at fair value	$ 0	$ 4

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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