Consolidated Statements of Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2018
Revenues:
Net premiums earned		$ 6,345.8	$ 5,919.9	[1]	$ 5,651.1	[1]
Title, escrow, and other fees		391.9	321.1		289.8
Total premiums and fees		6,737.8	6,241.1		5,940.9
Net investment income		438.9	450.7		431.8
Other income		131.2	132.6		121.6
Total operating revenues		7,308.0	6,824.4		6,494.4
Investment gains (losses):
Realized from actual transactions		14.2	38.6		58.2
Realized from impairments		0.0	(2.0)		0.0
Unrealized from changes in fair value of equity securities		(156.2)	599.5		(293.8)
Total realized and unrealized investment gains (losses)		(142.0)	636.1		(235.6)
Total revenues	[2]	7,166.0	7,460.5		6,258.8
Benefits, Claims and Expenses:
Benefits, claims and settlement expenses		2,472.5	2,545.3		2,440.9
Dividends to policyholders		18.9	27.3		19.8
Underwriting, acquisition, and other expenses		3,942.4	3,525.4		3,317.7
Interest and other charges		43.7	40.0		42.2
Total expenses		6,477.5	6,138.1		5,820.7
Income (loss) before income taxes (credits)		688.4	1,322.4		438.1
Income Taxes (Credits):
Current		156.9	238.4		114.1
Deferred		(27.1)	27.4		(46.5)
Total		129.7	265.9		67.5
Net Income (Loss)		$ 558.6	$ 1,056.4		$ 370.5
Net Income (Loss) Per Share:
Net income (loss) per share: basic (in dollars per share)		$ 1.87	$ 3.52		$ 1.26
Net income (loss) per share: diluted (in dollars per share)		$ 1.87	$ 3.51		$ 1.24
weighted average number of shares outstanding, basic		298,407,921	299,885,468		294,248,871
Weighted Average Number of Shares Outstanding, Diluted	[3]	298,898,673	301,227,715		301,016,076

[1] Certain reclassifications were made to net premiums earned, title, escrow, and other fees, and underwriting, acquisition, and other expenses in 2019 and 2018 to conform to the presentation adopted in 2020.

[2] (d)    Reclassification adjustments were made to certain Title segment revenues and expenses in prior periods to conform to the presentation adopted in 2020. See Note 1(c).

[3] In calculating earnings per share, accounting standards require that common shares owned by the Company's Employee Savings and Stock Ownership Plan that are as yet unallocated to participants in the plan be excluded from the calculation. Such shares are issued and outstanding, and have the same voting and other rights applicable to all other common shares.