Fair Value (Details - Level 3 narrative items) (USD $) In Millions, unless otherwise specified					9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 [FundsHeldDirectlyManagedMember]	Dec. 31, 2011 [FundsHeldDirectlyManagedMember]	Sep. 30, 2011 [TradingSecuritiesMember] [FixedMaturitiesMember]	Sep. 30, 2012 [TradingSecuritiesMember] [EquitySecuritiesMember]	Sep. 30, 2012 [TradingSecuritiesMember] [EquitySecuritiesMember]	Sep. 30, 2011 [TradingSecuritiesMember] [EquitySecuritiesMember]	Sep. 30, 2012 [TradingSecuritiesMember] [OtherInvestedAssetsMember]	Dec. 31, 2011 [TradingSecuritiesMember] [OtherInvestedAssetsMember]
Fair Value - Other Details [Line Items]
Aggregate carrying amount of other invested assets not carried at fair value									$ 275.1	$ 267.6
Transfers out of Level 3						6.8	6.8
Transfers into Level 3					40.2
Cash and cash equivalents			89.6	176.3
Accrued investment income			15.4	13.7
Other net assets			21.9	20.4
Fair Value Assets Level 2 To Level 1 Transfers Amount						1.1	1.1	0
Fair Value Assets Level 2 To Level 1 Transfers Amount 2	$ 0	$ 0