Fair Value (Assets Measured At Fair Value On A Nonrecurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	$ 58.0	$ 66.3
Level 1 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Level 2 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Level 3 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	58.0	66.3
Commercial Mortgage Loans [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	54.9	56.0
Commercial Mortgage Loans [Member] | Level 1 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Commercial Mortgage Loans [Member] | Level 2 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Commercial Mortgage Loans [Member] | Level 3 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	54.9	56.0
Real Estate Owned [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	3.1	10.3
Real Estate Owned [Member] | Level 1 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Real Estate Owned [Member] | Level 2 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	0	0
Real Estate Owned [Member] | Level 3 [Member]
Assets measured at fair value on a nonrecurring basis during the period and still held as of the balance sheet date	$ 3.1	$ 10.3