The allowance for commercial loan and lease losses represents the reserve to cover probable credit losses related to specifically identified commercial loans and leases, as well as probable credit losses inherent in the remainder of the commercial loan portfolio as of the balance sheet date. For banks, include currently required allocated transfer risk reserves. Include carryover of or adjustments to the allowance for commercial loan losses in connection with business combinations determined to be appropriate.

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+ Details

Investments (Schedule Of Recorded Investment In Commercial Mortgage Loans) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Investments
Commercial mortgage loans collectively evaluated for impairment	$ 5,098.4		$ 4,845.7
Commercial mortgage loans individually evaluated for impairment	98.6		104.7
Commercial mortgage loan loss allowance	(48.0)	(45.6)	(48.1)	(47.1)	(43.5)	(36.1)
Total commercial mortgage loans	$ 5,149.0		$ 4,902.3