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Stock-Based Compensation Stock-Based Compensation (Performance Based Restricted Stock Units) (Details) - shares shares in Millions | 9 Months Ended |
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Sep. 30, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Award Level Nonvested At Period End Number | 4.3 | 2.9
Performance Based Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Payment Award, Vesting Period | 3 years |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Additional Units Granted Maximum Percentage | 200.00% |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Threshold Award Level Nonvested Number | 2.1 |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Award Level Nonvested At Period End Number | 3.8 |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Outstanding At Threshold | 100.00% |
Cost Savings Performance Based Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Additional Units Granted Maximum Percentage | 100.00% |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Threshold Award Level Nonvested Number | 0.5 |
Minimum [Member] | Performance Based Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Compensation Arrangement By Share Based Payment Award Performance Share Unit Additional Units Granted Minimum Percentage | 0.00% |
Minimum [Member] | Cost Savings Performance Based Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Payment Award, Vesting Period | 2 years |
Maximum [Member] | Cost Savings Performance Based Restricted Stock Units [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share Based Payment Award, Vesting Period | 5 years |

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- Definition Maximum percentage applicable to performance based restricted stock units awarded based on the level of achievement of specified conditions at the vesting date. + References No definition available. + Details
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- Definition Minimum percentage applicable to performance based restricted stock units awarded based on the level of achievement of specified conditions at the vesting date. + References No definition available. + Details
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- Definition Percentage applicable to performance based restricted stock units awarded based on the threshold level of achievement of specified conditions at end of period. + References No definition available. + Details
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- Definition The number of outstanding performance share units at the threshold award level as of the end of the reporting period. + References No definition available. + 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 number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding 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 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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