Employee and Agent Benefits (Tables)

12 Months Ended

Dec. 31, 2022

Defined Benefit Plans and Other Postretirement Benefit Plans

Assumed Health Care Cost Trend Rates (Table)

	December 31,
	2022		2021
Health care cost trend rate assumed for next year under age 65	7.00	%	7.00	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.50	%	4.50	%
Year that the rate reaches the ultimate trend rate (under age 65)	2031		2030

Other postretirement benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Obligations and Funded Status (Table)

	December 31,
	2022		2021
	(in millions)
Change in benefit obligation
Benefit obligation at beginning of year	$	(79.2)	$	(92.5)
Interest cost		(1.9)		(1.8)
Actuarial gain		17.0		6.4
Participant contributions		(6.4)		(6.1)
Benefits paid		11.9		11.9
Plan transfer due to change in sponsorship		—		2.9
Benefit obligation at end of year	$	(58.6)	$	(79.2)
Change in plan assets
Fair value of plan assets at beginning of year	$	89.5	$	751.1
Actual return on plan assets		(15.0)		(0.8)
Employer contribution		1.4		1.5
Participant contributions		6.4		6.1
Benefits paid		(11.9)		(11.9)
Assets re-designated for non-retiree benefits		—		(656.5)
Fair value of plan assets at end of year	$	70.4	$	89.5
Amount recognized in statement of financial position
Other assets	$	11.8	$	10.3
Total	$	11.8	$	10.3
Amount recognized in accumulated other comprehensive income
Total net actuarial gain	$	(18.1)	$	(20.7)
Pre-tax accumulated other comprehensive income	$	(18.1)	$	(20.7)

Components of Net Periodic Benefit Cost (Income) (Table)

	For the year ended December 31,
	2022		2021		2020
	(in millions)
Interest cost	$	1.9	$	1.8	$	2.4
Expected return on plan assets		(3.7)		(3.5)		(34.8)
Amortization of prior service cost		—		—		0.1
Recognized net actuarial (gain) loss		(0.9)		(0.4)		0.2
Net periodic benefit income	$	(2.7)	$	(2.1)	$	(32.1)

Amounts Recognized in Net Periodic Benefit Cost and Accumulated Other Comprehensive (Income) Loss (Table)

	For the year ended December 31,
	2022		2021
	(in millions)
Other changes recognized in accumulated other comprehensive (income) loss
Net actuarial (gain) loss	$	1.7	$	(4.1)
Prior service benefit		—		(0.7)
Amortization of net gain		0.9		0.4
Total recognized in pre-tax accumulated other comprehensive (income) loss	$	2.6	$	(4.4)
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive income	$	(0.1)	$	(6.5)

Weighted-Average Assumptions Used to Determine Benefit Obligations (Table)

	December 31,
	2022		2021
Discount rate	5.05	%	2.55	%
Rate of compensation increase	N/A		N/A

Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost (Table)

	For the year ended December 31,
	2022		2021		2020
Discount rate (1)	2.55	%	2.15	%	2.95	%
Expected long-term return on plan assets	4.25	%	4.25	%	4.95	%
Rate of compensation increase	N/A		N/A		N/A	%

(1) During the second quarter 2020, subsidy increases provided under the long-term care plan were capped at 5% per calendar year. This change was remeasured as of March 31, 2020. A discount rate of 2.95% was used until the remeasurement date at which time a discount rate of 2.90% was used.

Fair Value of Plan Assets (Table)

	December 31, 2022
	Assets		Fair value hierarchy level
	measured at
	fair value		Level 1		Level 2		Level 3
	(in millions)
Asset category
Cash and cash equivalents	$	0.5	$	0.5	$	—	$	—
Fixed income security portfolios (1)		34.7		34.7		—		—
U.S. equity portfolios (2)		25.6		25.6		—		—
International equity portfolios (3)		9.6		9.6		—		—
Total	$	70.4	$	70.4	$	—	$	—

	December 31, 2021
	Assets		Fair value hierarchy level
	measured at
	fair value		Level 1		Level 2		Level 3
	(in millions)
Asset category
Cash and cash equivalents	$	0.5	$	0.5	$	—	$	—
Fixed income security portfolios (1)		41.8		41.8		—		—
U.S. equity portfolios (2)		32.9		32.9		—		—
International equity portfolios (3)		14.3		14.3		—		—
Total	$	89.5	$	89.5	$	—	$	—

(1) The portfolios invest in various fixed income securities, primarily of U.S. origin. These include, but are not limited to, corporate bonds, residential mortgage-backed securities, commercial mortgage-backed securities, U.S. Treasury securities, agency securities, asset-backed securities and collateralized mortgage obligations.

(2) The portfolios invest primarily in publicly traded equity securities of large U.S. companies.

(3) The portfolios invest primarily in publicly traded equity securities of non-U.S. companies.

Target Asset Allocation (Table)

Asset category	Target allocation
Fixed income security portfolios	50	%
U.S. equity portfolios	35	%
International equity portfolios	15	%

Estimated Future Benefit Payments (Table)

	Other postretirement
	benefits (gross benefit
	payments, including
	prescription drug benefits)
	(in millions)
Year ending December 31:
2023	$	11.6
2024		10.7
2025		9.7
2026		8.6
2027		7.6
2028-2032		30.1