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Equity Compensation Plans (Details 5) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Other Consolidated Equity Compensation Information |  |  |
Equity compensation expense | $ 101 | $ 110 | $ 98
LTIP cash settled vestings | 66 | 19 | 36
DER cash payments | 7 | 4 | 4
Units withheld for taxes (in units) | 0.5 | 0.2 | 0.4
Vested awards settled in cash (in units) | 1.7 | 0.8 | 1.2
Equity Compensation Plan Fair Value Amortization |  |  |
2013 | 49 |  |
2014 | 26 |  |
2015 | 10 |  |
2016 | 3 |  |
Total | 88 |  |
Share-based Compensation Arrangement, by Share-based Payment Award |  |  |
LTIP unit settled vestings | 62 | 24 | 26
PNG |  |  |
Share-based Compensation Arrangement, by Share-based Payment Award |  |  |
LTIP unit settled vestings | $ 1 | $ 2 |

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- Definition The amount of amortization expense expected to be recognized during the twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the third twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The amount of amortization expense expected to be recognized during the second twelve-month period following the balance sheet date for the amortization of the unrecognized expense based on fair value of outstanding awards related to equity compensation plans. + References No definition available. + Details
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- Definition The total settlement date fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units in accordance with the terms of the arrangement, and for which no expense was recognized in equity during prior periods. + References No definition available. + Details
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- Definition Represents the vested units which were settled in cash during the reporting period as a result of any share-based compensation plan other than an employee stock ownership plan. + References No definition available. + Details
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