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Fair Value Of Financial Instruments (Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | |
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Mar. 31, 2012
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Mar. 31, 2011
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| Fair Value Of Financial Instruments [Abstract] | Ìý | Ìý |
| Beginning balance - January 1 | $ 157.9 | $ 45.6 |
| Total gains | Ìý | Ìý |
| Included in earnings | 43.3 | 44.6 |
| Settlements | (132.0) | (22.1) |
| Ending balance - March 31 | 69.2 | 68.1 |
| Total gains for the period included in earnings attributable to the change in unrealized gains on assets still held at the reporting date | $ 43.3 | $ 44.6 |
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- Definition
This item represents the amount of the total change in unrealized (holding) gains or losses for the period which are included in the statement of income (or changes in net assets) in trading revenues. Such unrealized (holding) gains or losses relate to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents total gains or losses for the period (realized and unrealized), arising from assets measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in earnings or resulted in a change in net asset value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
This element represents an asset measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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