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Marketable Securities (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 29, 2013 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | $ 1,399,712 | $ 1,160,955 |
Unrealized Gain |  | 371 |  |
Unrealized Loss |  | (243) | (1,583) |
Fair Value |  | 1,399,840 | 1,159,372 |
Debt securities due in one year or less |  | 1,011,459 | 1,057,990 |
Debt securities due after one year through two years |  | 314,184 |  |
Debt securities |  | 1,325,643 | 1,057,990 |
Loss on investments | (1,575) | (1,575) |  |
Realized investment gains losses, description |  | Realized gains and losses on sales of investments were not material in 2013, 2012 and 2011. | Realized gains and losses on sales of investments were not material in 2013, 2012 and 2011. | Realized gains and losses on sales of investments were not material in 2013, 2012 and 2011.
Cash Equivalents [Member] |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 36,966 | 101,382 |
Fair Value |  | 36,966 | 101,382 |
Investments [Member] |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 1,362,746 | 1,059,573 |
Unrealized Gain |  | 371 |  |
Unrealized Loss |  | (243) | (1,583) |
Fair Value |  | 1,362,874 | 1,057,990 |
US Treasury Securities |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 556,438 | 470,421 |
Unrealized Gain |  | 111 |  |
Unrealized Loss |  | (10) |  |
Fair Value |  | 556,539 | 470,421 |
Foreign Government Debt Securities |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 139,670 | 313,237 |
Fair Value |  | 139,670 | 313,237 |
Corporate Debt Securities |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 629,477 | 311,607 |
Unrealized Gain |  | 190 |  |
Unrealized Loss |  | (233) |  |
Fair Value |  | 629,434 | 311,607 |
Time Deposits |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 74,050 | 64,037 |
Fair Value |  | 74,050 | 64,037 |
Equity Securities |  |  |  |
Cash, Cash Equivalents and Short-Term Investments [Line Items] |  |  |  |
Amortized Cost |  | 77 | 1,653 |
Unrealized Gain |  | 70 |  |
Unrealized Loss |  |  | (1,583) |
Fair Value |  | $ 147 | $ 70 |

X
- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.7(c),9(a)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (c)-(e) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition This item represents the cost of cash equivalents and debt and equity securities, 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. + References No definition available. + Details
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- Definition Amount of debt securities at fair value maturing in the next rolling twelve months following the latest balance sheet presented. + References No definition available. + Details
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- Definition Amount of debt securities at fair value maturing in the second rolling twelve months through the fifth rolling twelve months following the latest balance sheet presented. + References No definition available. + Details
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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents cash equivalents and short-term investments as of the balance sheet date. + References No definition available. + Details
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- Definition This item represents the gross unrealized gains for securities, at a point in time. + References No definition available. + Details
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- Definition The net realized gains or losses on investments during the period, not including gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity. + References No definition available. + Details
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