Note 9 - Other Real Estate Investments (Detail) - Preferred Equity Investments - Balance Sheet Disclosures (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets	$ 9,031.0	$ 9,767.8
Partners’/Members’ capital	3,593.8	3,662.0
	9,031.0	9,767.8
Preferred Equity Investments [Member] | Real estate, net [Member]
Assets	824.7	1,058.1
Preferred Equity Investments [Member] | Other Assets [Member]
Assets	719.1	760.5
Preferred Equity Investments [Member] | Notes and Mortgage Payable [Member]
Liabilities	1,116.9	1,338.7
Preferred Equity Investments [Member] | Other Liabilities [Member]
Liabilities	51.8	39.9
Preferred Equity Investments [Member]
Assets	1,543.8	1,818.6
Partners’/Members’ capital	375.1	440.0
	$ 1,543.8	$ 1,818.6