Quarterly report pursuant to Section 13 or 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 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance - January 1 $ 33.0 $ 45.1 $ 58.9 $ 62.4
Total gains        
Included in earnings 62.6 57.6 124.6 118.0
Settlements (41.1) (36.0) (129.0) (113.7)
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Ending balance - September 30 54.5 66.7 54.5 66.7
Total gains for the period included in earnings attributable to the change in unrealized gains on assets still held at the reporting date 62.6 57.6 124.6 118.0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Beginning balance - January 1 (20.2) (32.0) (10.3) (11.3)
Total gains        
Included in earnings (3.1) 20.6 (23.3) (11.4)
Settlements 0 0 10.3 11.3
Transfers into Level 3 0 0 0 0
Transfers out of Level 3 0 0 0 0
Ending balance - September 30 (23.3) (11.4) (23.3) (11.4)
Total losses for the period included in earnings attributable to the change in unrealized losses on liabilities still held at the reporting date $ (3.1) $ 20.6 $ (23.3) $ (11.4)