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Share-Based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2016
Share Based Compensation Plans |
Summary of activity for vested and unvested stock options outstanding |
|  |  |  |  |  |  | Weighted-average |  |  |
|  | Number |  | Weighted-average |  | remaining |  | Aggregate |
|  | of shares |  | exercise price |  | contractual term |  | intrinsic value |
|  | under option |  | per share |  | (years) |  | (in millions) |
Outstanding at January 1, 2016 |  | 1,622,317 |  | $ | 73.66 |  | 4.81 |  | $ | — |
Granted |  | 945,724 |  |  | 8.61 |  |  |  |  |  |
Forfeited |  | (633,346) |  |  | 64.44 |  |  |  |  |  |
Outstanding at December 31, 2016 |  | 1,934,695 |  | $ | 44.88 |  | 6.12 |  | $ | 6 |
Vested and exercisable at December 31, 2016 |  | 1,022,393 |  | $ | 77.24 |  | 3.45 |  | $ | — |
Service-based awards |
Share Based Compensation Plans |
Summary of unvested deferred units activity |
|  | Number |  | Weighted-average |
|  | of |  | grant-date fair value |
|  | units |  | per unit |
Unvested at January 1, 2016 |  | 3,030,444 |  | $ | 25.65 |
Granted |  | 3,155,382 |  |  | 8.69 |
Vested |  | (1,725,734) |  |  | 28.08 |
Forfeited |  | (454,010) |  |  | 9.52 |
Unvested at December 31, 2016 |  | 4,006,082 |  | $ | 13.10 |
Performance-based awards |
Share Based Compensation Plans |
Summary of unvested deferred units activity |
|  | Number |  | Weighted-average |
|  | of |  | grant-date fair value |
|  | units |  | per unit |
Unvested at January 1, 2016 |  | 702,131 |  | $ | 18.81 |
Granted |  | 997,362 |  |  | 11.60 |
Vested |  | (187,000) |  |  | 32.05 |
Forfeited |  | (72,887) |  |  | 17.12 |
Unvested at December 31, 2016 |  | 1,439,606 |  | $ | 14.40 |

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- Definition Disclosure of the number and weighted-average grant date fair value for deferred units that were outstanding at the beginning and end of the year, and the number of deferred units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -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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