Other Comprehensive Income (Loss) (Tables)

3 Months Ended

Mar. 31, 2023

Equity [Abstract]

Changes in Other Comprehensive Income (Loss)

The following tables provide changes in other comprehensive income (loss).

	Three Months Ended March 31,
	2023									2022
				Tax									Tax
				Benefit			Net of						Benefit			Net of
(in millions)	Pre-Tax			(Expense)			Tax			Pre-Tax			(Expense)			Tax
Changes in net unrealized gains (losses) on investment    securities:
Net unrealized gains (losses) arising during period    for those having no credit losses in Consolidated    Statement of Income	$	107.7		$	(22.6	)	$	85.1		$	(477.5	)	$	100.3		$	(377.2	)
Net unrealized gains (losses) arising during period    for those having credit losses in Consolidated    Statement of Income		0.8			(0.1	)		0.7			(1.2	)		0.2			(1.0	)
Amount of (gains) losses realized from sales and    other recognized in Consolidated Statement    of Income		1.1			(1.0	)		0.1			(3.0	)		0.6			(2.4	)
Amount of credit-related impairments recognized    in the Consolidated Statement of Income		0.4			(0.1	)		0.3			0.6			(0.1	)		0.5
Amount of additional impairment losses   recognized in the Consolidated   Statement of Income		10.3			(2.2	)		8.1			0.3			(0.1	)		0.2
Net unrealized gains (losses)		120.3			(26.0	)		94.3			(480.8	)		100.9			(379.9	)
Pension and postretirement benefits:
Amortization of net actuarial losses    recognized as net periodic benefit cost		2.0			(0.4	)		1.6			1.4			(0.3	)		1.1
Long-duration insurance contracts:
Net change in market risk		(2.7	)		0.6			(2.1	)		8.8			(1.9	)		6.9
Other comprehensive income (loss)	$	119.6		$	(25.8	)	$	93.8		$	(470.6	)	$	98.7		$	(371.9	)

Reclassifications Out of Accumulated Other Comprehensive Loss

Reclassifications out of accumulated other comprehensive loss were as follows:

	Three Months Ended
	March 31,
(in millions)	2023			2022
	Amount Reclassified from
Details about Accumulated Other	Accumulated Other						Affected Line Item in the Statement
Comprehensive Loss Components	Comprehensive Loss						Where Net Income (Loss) is Presented
Net unrealized gains (losses) on      investment securities	$	(1.1	)	$	3.0		Net realized gains (losses) from sales    and other
		(10.7	)		(0.9	)	Impairments on investments
		(11.8	)		2.1		Total before tax
		3.3			(0.4	)	Income tax benefit (expense)
		(8.5	)		1.7		Continuing operations; net of tax
Amortization of defined benefit pension    and postretirement actuarial losses		(2.0	)		(1.4	)	Loss adjustment expenses and other    operating expenses (1)
		0.4			0.3		Income tax benefit
		(1.6	)		(1.1	)	Continuing operations; net of tax
Net change in market risk		—			0.2		Loss from discontinued life businesses
		—			(0.1	)	Income tax benefit (expense)
		—			0.1		Discontinuing operations; net of tax
Total reclassifications for the period	$	(10.1	)	$	0.7		Benefit (expense) reflected in income (loss),    net of tax

(1)The amount reclassified from accumulated other comprehensive income (loss) for the pension and postretirement benefits was allocated approximately 40% to loss adjustment expenses and 60% to other operating expenses for the three months ended March 31, 2023 and 2022.