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AFFORDABLE HOUSING PARTNERSHIPS AND OTHER INVESTMENTS (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Y
Dec. 31, 2011
AFFORDABLE HOUSING PARTNERSHIPS AND OTHER INVESTMENTS    
Minimum compliance period to fully utilize the tax credits (in years) 15  
Investments in affordable housing partnerships $ 181.9 $ 144.4
Other investments in affordable housing partnerships 50.8 49.7
Total unfunded commitments for investments $ 99.1 $ 86.0