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Employee Incentive Plans (Tables) | 9 Months Ended
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Sep. 30, 2016
Employee Incentive Plans [Abstract] |
Share Grants And Fair Value |
﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ |  |  |  | Fair Value at
﻿ |  |  |  | Date of Grant
﻿ |  | Shares |  | ($ millions)
﻿Prior periods (since inception) |  | 17,284,454 |  | $ | 302
﻿December 31, 2013 |  | 1,894,046 |  |  | 46
﻿December 31, 2014 |  | 1,709,968 |  |  | 49
﻿December 31, 2015 |  | 1,211,533 | 1 |  | 52
﻿ |  | 22,100,001 |  | $ | 449
﻿
| (1) |  | Stock Incentive Plan number of granted shares related to 2015 was adjusted by 12,454 additional shares during the nine months ended September, 30, 2016.
2007 Stock Incentive Plan, ROI Summary |
﻿ |  |  |  |  |
﻿ |  |  |  |  |
﻿ |  | Stock |  | ROI Unit |
﻿ |  | Incentive Plan |  | Stock Plan |
﻿ |  | Shares |  | (Shares) |
﻿Balance, December 31, 2015 |  | 8,937,985 | 1 | 6,370 |
﻿Granted |  | — |  | — |
﻿Forfeited |  | (66,137) |  | — |
﻿Distributed |  | (2,400,019) |  | (1,376) |
﻿Balance, September 30, 2016 |  | 6,471,829 |  | 4,994 |
﻿
| (1) |  | Stock Incentive Plan number of granted shares related to 2015 was adjusted by 12,454 additional shares during the nine months ended September 30, 2016.

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- Definition Tabular disclosure of share-based compensation plans that may be presented in a single table for outstanding, vested and expected to vest, and exercisable awards. The information that may be disclosed in this table may include, but is not limited to, number of shares, weighted average exercise price, weighted average remaining contractual life, and aggregate intrinsic value. + References No definition available. + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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