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Preferred And Common Stock (Schedule Of Options Fully Vested And/Or Expected To Vest And Options Fully Vested And Exercisable) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Fully Vested and/or Expected to Vest, Number of options | 46.8 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average remaining contractual life, years | 3.67 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average exercise price | $ 17.41 | [1]
Options Fully Vested and/or Expected to Vest, Intrinsic value | $ 7.0 | [1]
Options Fully Vested and Exercisable, Number of options | 28.8 |
Options Fully Vested and Exercisable, Weighted average remaining contractual life, years | 2.21 |
Options Fully Vested and Exercisable, Weighted average exercise price | $ 20.90 |
Options Fully Vested and Exercisable, Intrinsic value | 4.0 |
$6.12 - $19.93 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Fully Vested and/or Expected to Vest, Number of options | 32.2 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average remaining contractual life, years | 5.10 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average exercise price | $ 10.72 | [1]
Options Fully Vested and/or Expected to Vest, Intrinsic value | 7.0 | [1]
Options Fully Vested and Exercisable, Number of options | 14.2 |
Options Fully Vested and Exercisable, Weighted average remaining contractual life, years | 3.94 |
Options Fully Vested and Exercisable, Weighted average exercise price | $ 9.32 |
Options Fully Vested and Exercisable, Intrinsic value | 4.0 |
Range of exercise price, lower limit | $ 6.12 |
Range of exercise price, upper limit | $ 19.93 |
$19.94 - $27.71 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Fully Vested and/or Expected to Vest, Number of options | 2.8 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average remaining contractual life, years | 1.03 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average exercise price | $ 22.56 | [1]
Options Fully Vested and Exercisable, Number of options | 2.8 |
Options Fully Vested and Exercisable, Weighted average remaining contractual life, years | 1.03 |
Options Fully Vested and Exercisable, Weighted average exercise price | $ 22.56 |
Options Fully Vested and Exercisable, Intrinsic value |  |
Range of exercise price, lower limit | $ 19.94 |
Range of exercise price, upper limit | $ 27.71 |
$27.72 - $35.49 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Fully Vested and/or Expected to Vest, Number of options | 4.1 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average remaining contractual life, years | 0.94 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average exercise price | $ 29.47 | [1]
Options Fully Vested and Exercisable, Number of options | 4.1 |
Options Fully Vested and Exercisable, Weighted average remaining contractual life, years | 0.94 |
Options Fully Vested and Exercisable, Weighted average exercise price | $ 29.47 |
Options Fully Vested and Exercisable, Intrinsic value |  |
Range of exercise price, lower limit | $ 27.72 |
Range of exercise price, upper limit | $ 35.49 |
$35.50 - $47.35 [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Options Fully Vested and/or Expected to Vest, Number of options | 7.7 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average remaining contractual life, years | 0.12 | [1]
Options Fully Vested and/or Expected to Vest, Weighted average exercise price | $ 37.28 | [1]
Options Fully Vested and Exercisable, Number of options | 7.7 |
Options Fully Vested and Exercisable, Weighted average remaining contractual life, years | 0.12 |
Options Fully Vested and Exercisable, Weighted average exercise price | $ 37.28 |
Options Fully Vested and Exercisable, Intrinsic value |  |
Range of exercise price, lower limit | $ 35.50 |
Range of exercise price, upper limit | $ 47.35 |
[1] | Expected forfeitures are immaterial to the Company and are not reflected in the table above.

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- Definition The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date. + 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 As of the balance sheet date, the total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of fully vested and expected to vest options that are exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average period between the balance sheet date and expiration date for fully vested and expected to vest options that are exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 weighted-average period between the balance sheet date and expiration date for fully vested and expected to vest options outstanding, which may be expressed in a decimal value for number of years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph A240 -Subparagraph d(1) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 Statement of Financial Accounting Standard (FAS) -Number 123R -Paragraph 64 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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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