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Annual report pursuant to Section 13 and 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value, Assets and Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation) (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value, Assets and Liabilities Measured On Recurring Basis, Unobservable Input Reconciliation) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Ìý Ìý Ìý Ìý
Beginning balance - January 1 Ìý Ìý $ 157.9 $ 45.6
Total gains Ìý Ìý Ìý Ìý
Included in earnings Ìý Ìý 174.9 403.0
Included in other comprehensive income Ìý Ìý 0 0
Settlements Ìý Ìý (270.4) (319.7)
Transfers into Level 3 49.0 Ìý 0 49.0
Transfers out of Level 3 Ìý (20.0) 0 (20.0)
Ending balance - December 31 157.9 Ìý 62.4 157.9
Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) on assets (liabilities) still held at the reporting date Ìý Ìý 174.9 403.0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Ìý Ìý Ìý Ìý
Beginning balance - January 1 Ìý Ìý (19.5) 0
Total gains Ìý Ìý Ìý Ìý
Included in earnings Ìý Ìý (11.3) (19.5)
Included in other comprehensive income Ìý Ìý 0 0
Settlements Ìý Ìý 19.5 0
Transfers into Level 3 Ìý Ìý 0 0
Transfers out of Level 3 Ìý Ìý 0 0
Ending balance - December 31 (19.5) Ìý (11.3) (19.5)
Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) on assets (liabilities) still held at the reporting date Ìý Ìý $ (11.3) $ (19.5)