Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Net premiums earned	$ 1,238.6	$ 1,259.4	$ 3,582.1	$ 3,520.7
Title, escrow, and other fees	126.7	112.7	342.9	319.4
Total premiums and fees	1,365.4	1,372.1	3,925.1	3,840.1
Net investment income	95.7	104.2	287.0	288.9
Other income	27.5	27.8	81.4	79.8
Total operating revenues	1,488.7	1,504.2	4,293.6	4,208.9
Realized investment gains (losses):
From sales	12.2	41.4	63.1	77.0
From impairments	(4.9)	0.0	(4.9)	0.0
Total realized investment gains (losses)	7.2	41.4	58.1	77.0
Total revenues	1,496.0	1,545.7	4,351.7	4,285.9
Benefits, Claims and Expenses:
Benefits, claims and settlement expenses	590.7	653.4	1,747.8	1,822.6
Dividends to policyholders	4.4	3.3	14.3	12.3
Underwriting, acquisition, and other expenses	724.0	693.9	2,060.3	1,929.5
Interest and other charges	12.6	10.2	34.0	31.0
Total expenses	1,331.9	1,360.9	3,856.5	3,795.5
Income before income taxes (credits)	164.0	184.7	495.2	490.3
Income Taxes (Credits):
Current	49.4	68.6	145.2	164.1
Deferred	3.6	(9.8)	14.9	(5.2)
Total	53.1	58.8	160.2	158.8
Net Income	$ 110.9	$ 125.9	$ 335.0	$ 331.4
Net Income Per Share:
Net income (loss) per share: Basic (in dollars per share)	$ 0.43	$ 0.48	$ 1.29	$ 1.28
Net income (loss) per share: Diluted (in dollars per share)	$ 0.39	$ 0.44	$ 1.17	$ 1.16
Average shares outstanding: Basic (in shares)	259,414,230	259,266,696	259,227,605	259,411,347
Average shares outstanding: Diluted (in shares)	296,444,432	295,868,117	296,193,090	295,930,527
Dividends Per Common Share:
Cash	$ 0.1875	$ 0.1850	$ 0.5625	$ 0.5550