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Marketable Securities - Schedule of Marketable Securities (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Cost | $ 165 | $ 109
Unrealized Gain (Loss) | 4 | 1
Fair Value | 169 | 110
US Treasury and Government [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost | 39 | 27
Unrealized Gain (Loss) | 0 | 0
Fair Value | 39 | 27
Corporate Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost | 35 | 30
Unrealized Gain (Loss) |  | (1)
Fair Value | 35 | 29
Certificates of Deposit [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost | 25 | 21
Unrealized Gain (Loss) |  |
Fair Value | 25 | 21
Other Securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Cost | 66 | 31
Unrealized Gain (Loss) | 4 | 2
Fair Value | $ 70 | $ 33

X
- Definition Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562 + Details
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