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Share-Based Compensation (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock option grant price as percent of market price | 100.00% |  |
Award vesting period | 3 years |  |
Award vesting rights percentage | 33.00% |  |
Stock option contractual term | 10 years |  |
Number of shares available for grant | 15 |  |
Implied volatility rate, minimum maturities of traded options | 1 year |  |
Compensation cost not yet recognized | $ 3 |  |
Compensation cost not yet recognized, period for recognition | 1 year 9 months 18 days |  |
Estimated forfeiture rate | 25.50% |  |
Cost not yet recognized related to current year grants | 2.4 |  |
Compensation cost not yet recognized related to current year grants per year | 0.8 |  |
RSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award vesting period | 3 years |  |
Award vesting rights percentage | 33.00% |  |
Compensation cost not yet recognized | 13 |  |
Compensation cost not yet recognized, period for recognition | 1 year 8 months 12 days |  |
Estimated forfeiture rate | 24.18% |  |
Compensation cost not yet recognized related to current year grants per year | 12.0 |  |
Period before award can be converted to shares | 2 years |  |
Grant date fair value (in dollars per share) | $ 11.19 | $ 13.54 | $ 12.65
PSUs |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Compensation cost not yet recognized | 7 |  |
Compensation cost not yet recognized, period for recognition | 1 year 9 months 18 days |  |
Estimated forfeiture rate | 25.50% |  |
Cost not yet recognized related to current year grants | 6.0 |  |
Compensation cost not yet recognized related to current year grants per year | 2.0 |  |
Grant date fair value (in dollars per share) | $ 12.23 |  |
PSUs | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award payout range | 0.00% |  |
PSUs | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Award payout range | 200.00% |  |
PSUs With Market Conditions |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Grant date fair value (in dollars per share) | $ 13.28 | $ 19.75 | $ 17.68
Award, percent with market condition | 50.00% |  |
Performance stock units vesting rule measurement period | 3 years |  |
Grants in period, weighted average grant date fair value percent of stock price | 119.00% |  |
Decrease in grant date fair value if market condition not applied | $ 1 |  |
PSUs with Performance Condition |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Grant date fair value (in dollars per share) | $ 11.17 |  |
Award, percent with performance condition | 50.00% |  |
Performance stock units vesting rule measurement period | 3 years |  |

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- Definition The aggregate unrecognized cost of equity-based awards made to employees during the current period under equity-based compensation awards that have yet to vest. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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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