Consolidated Statement of Income (Parenthetical) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Changes in Other-Than-Temporary-Impairment (OTTI) Losses	[1]				$ (4.6)
Noncredit-related OTTI Losses Recorded in/(Reclassified from) OCI	[2]				0.7
Other Security Gains (Losses), net		$ (0.4)	$ 0.4	$ (0.3)	0.3
Investment Security Gains (Losses), net	[3]	$ (0.4)	$ 0.4	$ (0.3)	$ (3.6)

[1] For initial OTTI in the applicable period, the balance includes the excess of the amortized cost over the fair value of the impaired securities. For subsequent impairments of the same security, the balance includes any additional changes in fair value of the security subsequent to its most recently recorded OTTI.

[2] For initial OTTI in the applicable period, the balance includes the portion of the excess of amortized cost over the fair value of the impaired securities that was recorded in other comprehensive income (OCI). For subsequent impairments of the same security, the balance includes additional changes in OCI for that security subsequent to its most recently recorded OTTI.

[3] Changes in Other-Than-Temporary-Impairment (OTTI) Losses $ - $ - $ - $ (4.6 ) Noncredit-related OTTI Losses Recorded in/(Reclassified from) OCI - - - 0.7 Other Security Gains (Losses), net (0.4 ) 0.4 (0.3 ) 0.3 Investment Security Gains (Losses), net $ (0.4 ) $ 0.4 $ (0.3 ) $ (3.6 )