Stock-based Compensation Plans - Stock Options (Details) |
12 Months Ended | 108 Months Ended |
|---|---|---|
|
Dec. 31, 2017
USD ($)
$ / shares
shares
|
Dec. 31, 2017
USD ($)
$ / shares
shares
|
|
| Options | ||
| Outstanding at beginning of period (in shares) | 42,357,282 | |
| Forfeited (in shares) | (25,769,108) | |
| Outstanding at end of period (in shares) | 16,588,174 | 16,588,174 |
| Weighted-average Exercise Price | ||
| Outstanding at beginning of period (in dollars per share) | $ / shares | $ 50.57 | |
| Forfeited (in dollars per share) | $ / shares | 55.15 | |
| Outstanding at end of period (in dollars per share) | $ / shares | $ 43.44 | $ 43.44 |
| Outstanding, weighted average remaining contractual term (less than) | 1 year | |
| Aggregate intrinsic value | $ | $ 0 | $ 0 |
| Options granted (in shares) | 0 |
| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Gross number of share options (or share units) granted during the period. No definition available.
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- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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