Schedule IV - Reinsurance (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	$ 5,204.5	$ 4,708.4	$ 4,345.7
Ceded to other companies	774.8	684.2	661.7
Assumed from other companies	26.9	19.6	11.6
Net amount	4,456.6	4,043.8	3,695.5
Percentage of amount assumed to net	0.60%	0.50%	0.30%
Life Insurance in force [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	7,950.9	9,375.2	10,201.4
Ceded to other companies	3,946.9	4,853.0	5,312.1
Assumed from other companies	0	0	0
Net amount	4,004.0	4,522.1	4,889.2
Percentage of amount assumed to net	0.00%	0.00%	0.00%
General Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	3,235.7	2,949.9	2,716.2
Ceded to other companies	746.1	643.4	615.8
Assumed from other companies	24.1	17.9	8.9
Net amount	2,513.7	2,324.4	2,109.4
Percentage of amount assumed to net	1.00%	0.80%	0.40%
Title Insurance Group [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	1,564.4	1,248.6	1,005.5
Ceded to other companies	0	0	0.1
Assumed from other companies	2.7	1.6	2.5
Net amount	1,567.1	1,250.2	1,007.9
Percentage of amount assumed to net	0.20%	0.10%	0.30%
RFIG Run-off Business [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	326.4	429.8	526.4
Ceded to other companies	9.9	19.3	23.2
Assumed from other companies	0	0	0.1
Net amount	316.5	410.5	503.2
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Life Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	21.2	23.5	25.7
Ceded to other companies	8.1	10.2	10.4
Assumed from other companies	0	0	0
Net amount	13.1	13.3	15.2
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Accident and health Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	56.6	56.4	71.7
Ceded to other companies	10.4	11.1	12.1
Assumed from other companies	0	0	0
Net amount	46.1	45.2	59.6
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Life & Health Insurance [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	77.9	79.9	97.4
Ceded to other companies	18.5	21.3	22.5
Assumed from other companies	0	0	0
Net amount	59.3	58.6	74.9
Percentage of amount assumed to net	0.00%	0.00%	0.00%
Business Intersegment, Eliminations [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross amount	0	0	0
Ceded to other companies	0	0	0
Assumed from other companies	0	0	0
Net amount	$ 0	$ 0	$ 0
Percentage of amount assumed to net	0.00%	0.00%	0.00%