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Stockholders' Equity - Additional Information 1 (Detail) (Stock Appreciation Rights Expense [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Weighted average remaining vesting life | 1 year |
Other Current Liabilities [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Liability for SARs | $ 21 |
Other Non-current Liabilities [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Liability for SARs | 13 |
General and Administrative Expense [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Compensation expense | 38 | 18
Payment due to exercise SARs | 46 | 24
Liability for SARs | 34 |
Restructuring Charges [Member] |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |
Compensation expense | 1 | 9
Payment due to exercise SARs | 2 | 19
Liability for SARs | $ 1 |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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