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Long-Term Incentive Plans (Outstanding Stock Options) (Detail) (USD $) In Millions, except Share data, unless otherwise specified | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Number of Options, Outstanding | 3,715,406 | 5,963,268 | 6,425,073 | 6,650,947
Number of Options, Exercisable | 1,752,311 | 1,751,173 | 2,211,878 |
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding | 1 year 11 months 23 days |  |  |
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable | 1 year 3 months 29 days |  |  |
Weighted Average Exercise Price, Stock Options Outstanding | $ 20.6883 | $ 19.0485 | $ 21.3330 | $ 22.1713
Weighted Average Exercise Price, Stock Options Exercisable | $ 38.5120 | $ 45.0174 | $ 46.1478 |
Aggregate Intrinsic Value, Stock Options Outstanding | $ 20 |  |  |
$4.02-$36.69 [Member] |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Range of Average Exercise Price, Minimum | $ 4.02 |  |  |
Range of Average Exercise Price, Maximum | $ 36.69 |  |  |
Number of Options, Outstanding | 2,653,000 |  |  |
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding | 2 years 6 months 10 days |  |  |
Weighted Average Exercise Price, Stock Options Outstanding | $ 4.4840 |  |  |
Aggregate Intrinsic Value, Stock Options Outstanding | 20 |  |  |
$48.58-$70.86 [Member] |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Range of Average Exercise Price, Minimum | $ 48.58 |  |  |
Range of Average Exercise Price, Maximum | $ 70.86 |  |  |
Number of Options, Outstanding | 1,062,406 |  |  |
Weighted Average Remaining Contractual Life in Years, Stock Options Outstanding | 0 years 7 months 9 days |  |  |
Weighted Average Exercise Price, Stock Options Outstanding | $ 61.1530 |  |  |
Aggregate Intrinsic Value, Stock Options Outstanding | 0 |  |  |
Options Exercisable [Member] |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Number of Options, Exercisable | 1,752,311 |  |  |
Weighted Average Exercise Price, Stock Options Exercisable | $ 38.5120 |  |  |
Aggregate Intrinsic Value, Stock Options Exercisable | 5 |  |  |
Options Exercisable [Member] | $4.02-$36.69 [Member] |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Number of Options, Exercisable | 700,000 |  |  |
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable | 2 years 4 months 24 days |  |  |
Weighted Average Exercise Price, Stock Options Exercisable | $ 4.3879 |  |  |
Aggregate Intrinsic Value, Stock Options Exercisable | 5 |  |  |
Options Exercisable [Member] | $48.58-$70.86 [Member] |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Number of Options, Exercisable | 1,052,311 |  |  |
Weighted Average Remaining Contractual Life in Years, Stock Options Exercisable | 0 years 7 months 9 days |  |  |
Weighted Average Exercise Price, Stock Options Exercisable | $ 61.2115 |  |  |
Aggregate Intrinsic Value, Stock Options Exercisable | $ 0 |  |  |

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + 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 (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards 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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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + 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 (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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