XML 71 R55.htm IDEA: XBRL DOCUMENT v3.25.0.1

Employee and Agent Benefits (Tables)

12 Months Ended

Dec. 31, 2024

Defined Benefit Plans and Other Postretirement Benefit Plans

Obligations and Funded Status (Table)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Other postretirement

​

​

Pension benefits

​

benefits

​

​

December 31,

​

December 31,

​

2024

2023

2024

2023

​

​

(in millions)

Change in benefit obligation

​

​

​

​

​

​

​

​

​

​

​

​

Benefit obligation at beginning of year

​

$

(3,390.9)

​

$

(3,209.4)

​

$

(68.4)

​

$

(71.0)

​

Service cost

​

​

(59.2)

​

(55.6)

​

​

—

​

—

​

Interest cost

​

​

(161.5)

​

(160.1)

​

​

(3.2)

​

(3.4)

​

Actuarial gain (loss)

​

​

199.3

​

(119.7)

​

​

2.5

​

(2.9)

​

Participant contributions

​

​

—

​

—

​

​

(6.1)

​

(6.1)

​

Benefits paid

​

​

165.0

​

153.9

​

​

13.6

​

15.0

​

Settlement

​

​

1.4

​

​

—

​

​

—

​

​

—

​

Benefit obligation at end of year

​

$

(3,245.9)

​

$

(3,390.9)

​

$

(61.6)

​

$

(68.4)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Change in plan assets

​

​

​

​

​

​

​

​

​

​

​

​

​

Fair value of plan assets at beginning of year

​

$

2,909.6

​

$

2,726.3

​

$

99.8

​

$

94.4

​

Actual return on plan assets

​

​

(14.4)

​

258.5

​

​

8.4

​

12.7

​

Employer contribution

​

​

84.9

​

78.7

​

​

1.3

​

1.6

​

Participant contributions

​

​

—

​

—

​

​

6.1

​

6.1

​

Benefits paid

​

​

(165.0)

​

(153.9)

​

​

(13.6)

​

(15.0)

​

Settlement

​

​

(1.4)

​

​

—

​

​

—

​

​

—

​

Fair value of plan assets at end of year

​

$

2,813.7

​

$

2,909.6

​

$

102.0

​

$

99.8

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Amount recognized in statement of financial position

​

​

​

​

​

​

​

​

​

​

​

​

​

Other assets

​

$

—

​

$

—

​

$

40.4

​

$

31.4

​

Other liabilities

​

​

(432.2)

​

(481.3)

​

​

—

​

—

​

Total

​

$

(432.2)

​

$

(481.3)

​

$

40.4

​

$

31.4

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Amount recognized in accumulated other comprehensive (income) loss

​

​

​

​

​

​

​

​

​

​

​

​

​

Total net actuarial (gain) loss

​

$

371.7

​

$

425.4

​

$

(29.9)

​

$

(24.4)

​

Prior service benefit

​

​

(53.9)

​

(70.6)

​

​

(3.2)

​

(4.3)

​

Pre-tax accumulated other comprehensive (income) loss

​

$

317.8

​

$

354.8

​

$

(33.1)

​

$

(28.7)

​

​

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

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Pension benefits

​

Other postretirement benefits

​

​

For the year ended December 31,

​

2024

2023

2022

2024

2023

2022

​

​

(in millions)

Service cost

​

$

59.2

​

$

55.6

​

$

78.4

​

$

—

​

$

—

​

$

—

​

Interest cost

​

​

161.5

​

​

160.1

​

​

112.8

​

​

3.2

​

​

3.4

​

​

2.3

​

Expected return on plan assets

​

​

(170.4)

​

​

(163.2)

​

​

(178.9)

​

​

(4.5)

​

​

(4.6)

​

​

(4.9)

​

Amortization of prior service benefit

​

​

(16.7)

​

​

(16.8)

​

​

(16.8)

​

​

(1.1)

​

​

(0.8)

​

​

(1.1)

​

Recognized net actuarial (gain) loss

​

​

39.0

​

​

41.0

​

​

55.7

​

​

(0.9)

​

​

(1.0)

​

​

(1.1)

​

Settlement

​

​

0.2

​

​

—

​

​

—

​

​

—

​

​

—

​

​

—

​

Net periodic benefit cost (income)

​

$

72.8

​

$

76.7

​

$

51.2

​

$

(3.3)

​

$

(3.0)

​

$

(4.8)

​

​

We use the fair market value of assets to determine components of net periodic benefit cost.

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

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Pension benefits

​

Other postretirement benefits

​

​

For the year ended December 31,

​

2024

2023

2024

2023

​

​

(in millions)

Other changes recognized in accumulated other comprehensive (income) loss

​

​

​

​

​

​

​

​

​

​

​

​

Net actuarial (gain) loss

​

$

(14.5)

​

$

24.4

​

$

(6.4)

​

$

(5.2)

Amortization of gain (loss)

​

​

(39.0)

​

(41.0)

​

​

0.9

​

1.0

Amortization of prior service benefit

​

​

16.7

​

16.8

​

​

1.1

​

0.8

Settlement

​

​

(0.2)

​

​

—

​

​

—

​

​

—

Total recognized in pre-tax accumulated other comprehensive (income) loss

​

$

(37.0)

​

$

0.2

​

$

(4.4)

​

$

(3.4)

Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss

​

$

35.8

​

$

76.9

​

$

(7.7)

​

$

(6.4)

​

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

​

​	​	​	​	​	​
​	​	Pension benefits			​
​	​	December 31,			​
​		2024		2023	​
Discount rate	​	5.50	%	4.90	%
Interest crediting rate - cash balance benefit	​	5.00	%	5.00	%
Rate of compensation increase	​	4.52	%	4.56	%
​	​	​	​	​	​
​	​	Other postretirement benefits			​
​	​	December 31,			​
​		2024		2023	​
Discount rate	​	5.35	%	4.80	%
Rate of compensation increase	​	N/A	​	N/A	​

​

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

​

​	​	​	​	​	​	​	​
​	​	Pension benefits					​
​	​	For the year ended December 31,					​
​		2024		2023		2022	​
Discount rate	​	4.90	%	5.10	%	2.75	%
Expected long-term return on plan assets	​	6.10	%	6.20	%	5.20	%
Interest crediting rate - cash balance benefit	​	5.00	%	5.00	%	5.00	%
Rate of compensation increase:	​	​	​	​	​	​	​
Cash balance benefit	​	4.52	%	4.53	%	4.59	%
Traditional benefit	​	N/A	%	N/A	%	N/A	%
​	​	​	​	​	​	​	​
​	​	Other postretirement benefits					​
​	​	For the year ended December 31,					​
​		2024		2023		2022	​
Discount rate	​	4.80	%	5.00	%	2.50	%
Expected long-term return on plan assets	​	4.65	%	5.05	%	4.25	%
Rate of compensation increase	​	N/A	​	N/A	​	N/A	​

​

Assumed Health Care Cost Trend Rates (Table)

​

​	​	​	​	​	​
​	​	December 31,
​		2024		2023	​
Health care cost trend rate assumed for next year under age 65	​	7.50	%	7.50	%
Health care cost trend rate assumed for next year age 65 and over	​	6.50	%	6.50	%
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)	​	2033	​	2032	​
Year that the rate reaches the ultimate trend rate (65 and older)	​	2032	​	2031	​

​

Estimated Future Benefit Payments (Table)

​

​	​	​	​	​	​	​	​
​	​		​	​	Other postretirement		​
​	​	​	​	​	benefits (gross benefit		​
​	​	​	​	​	payments, including		​
​		Pension benefits			prescription drug benefits)
​	​	(in millions)					​
Year ending December 31:	​	​	​	​	​	​	​
2025	​	$	227.2	​	$	12.6	​
2026	​	​	209.3	​	​	11.4	​
2027	​	​	219.2	​	​	10.3	​
2028	​	​	223.6	​	​	9.2	​
2029	​	​	230.8	​	​	8.5	​
2030-2034	​	​	1,273.2	​	​	34.0	​

​

Defined Benefit Pension Plans Supplemental Information (Table)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

For the year ended December 31,

​

​

2024

​

2023

​

​

Qualified

​

Nonqualified

​

​

​

​

Qualified

​

Nonqualified

​

​

​

​

Plan

Plan

Total

Plan

Plan

Total

​

​

(in millions)

Amount recognized in statement of financial position

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Other assets

​

$

—

​

$

—

​

$

—

​

$

—

​

$

—

​

$

—

​

Other liabilities

​

​

(34.9)

​

​

(397.3)

​

​

(432.2)

​

​

(58.3)

​

​

(423.0)

​

​

(481.3)

​

Total

​

$

(34.9)

​

$

(397.3)

​

$

(432.2)

​

$

(58.3)

​

$

(423.0)

​

$

(481.3)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Amount recognized in accumulated other comprehensive loss

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Total net actuarial loss

​

$

331.0

​

$

40.7

​

$

371.7

​

$

361.4

​

$

64.0

​

$

425.4

​

Prior service benefit

​

​

(47.4)

​

​

(6.5)

​

​

(53.9)

​

​

(60.0)

​

​

(10.6)

​

​

(70.6)

​

Pre-tax accumulated other comprehensive loss

​

$

283.6

​

$

34.2

​

$

317.8

​

$

301.4

​

$

53.4

​

$

354.8

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Components of net periodic benefit cost

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Service cost

​

$

55.2

​

$

4.0

​

$

59.2

​

$

51.6

​

$

4.0

​

$

55.6

​

Interest cost

​

​

141.6

​

​

19.9

​

​

161.5

​

​

139.7

​

​

20.4

​

​

160.1

​

Expected return on plan assets

​

​

(170.4)

​

​

—

​

​

(170.4)

​

​

(163.2)

​

​

—

​

​

(163.2)

​

Amortization of prior service benefit

​

​

(12.7)

​

​

(4.0)

​

​

(16.7)

​

​

(12.6)

​

​

(4.2)

​

​

(16.8)

​

Recognized net actuarial loss

​

​

35.5

​

​

3.5

​

​

39.0

​

​

38.8

​

​

2.2

​

​

41.0

​

Settlement

​

​

0.2

​

​

—

​

​

0.2

​

​

—

​

​

—

​

​

—

​

Net periodic benefit cost

​

$

49.4

​

$

23.4

​

$

72.8

​

$

54.3

​

$

22.4

​

$

76.7

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Other changes recognized in accumulated other comprehensive loss

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Net actuarial (gain) loss

​

$

5.2

​

$

(19.7)

​

$

(14.5)

​

$

9.5

​

$

14.9

​

$

24.4

​

Amortization of net loss

​

​

(35.4)

​

​

(3.6)

​

​

(39.0)

​

​

(38.8)

​

​

(2.2)

​

​

(41.0)

​

Amortization of prior service benefit

​

​

12.7

​

​

4.0

​

​

16.7

​

​

12.6

​

​

4.2

​

​

16.8

​

Settlement

​

​

(0.2)

​

​

—

​

​

(0.2)

​

​

—

​

​

—

​

​

—

​

Total recognized in pre-tax accumulated other comprehensive (income) loss

​

$

(17.7)

​

$

(19.3)

​

$

(37.0)

​

$

(16.7)

​

$

16.9

​

$

0.2

​

Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive loss

​

$

31.7

​

$

4.1

​

$

35.8

​

$

37.6

​

$

39.3

​

$

76.9

​

​

Pension benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Accumulated Benefit Obligation in Excess of Plan Assets (Table)

​

​	​	​	​	​	​	​	​
​	​	December 31,
​		2024			2023
​	​	(in millions)
Projected benefit obligation	​	$	3,245.9	​	$	3,390.9	​
Accumulated benefit obligation	​	​	3,245.9	​		3,390.9	​
Fair value of plan assets	​	​	2,813.7	​		2,909.6	​

Fair Value of Plan Assets (Table)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 2024

​

​

​

Assets

​

Amount

​

Fair value hierarchy level

​

​

​

measured at

​

measured at

​

​

​

​

fair value

net asset value

Level 1

Level 2

Level 3

​

​

​

(in millions)

​

Asset category

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Pooled separate account investments:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

U.S. large cap equity portfolios (1)

​

$

236.5

​

$

—

​

$

—

​

$

236.5

​

$

—

​

U.S. small/mid cap equity portfolios (2)

​

98.4

​

​

—

​

—

​

98.4

​

—

​

Balanced asset portfolios (3)

​

135.0

​

​

—

​

—

​

135.0

​

—

​

International equity portfolios (4)

​

135.9

​

​

—

​

—

​

135.9

​

—

​

Fixed income security portfolios (5)

​

​

26.8

​

​

—

​

​

—

​

​

26.8

​

​

—

​

Real estate investment portfolios (6)

​

133.6

​

​

—

​

—

​

133.6

​

—

​

Single client separate account investments:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Fixed income securities:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

U.S. government and agencies

​

​

93.7

​

​

—

​

​

93.7

​

​

—

​

​

—

​

States and political subdivisions

​

​

15.5

​

​

—

​

​

—

​

​

15.5

​

​

—

​

Corporate

​

​

1,387.2

​

​

—

​

​

—

​

​

1,387.2

​

​

—

​

Hedge funds (7)

​

​

3.6

​

​

3.6

​

​

—

​

​

—

​

​

—

​

Mutual funds

​

​

109.9

​

​

—

​

​

109.9

​

​

—

​

​

—

​

Pooled separate account investment (8)

​

​

423.0

​

​

—

​

​

—

​

​

423.0

​

​

—

​

Other (9)

​

​

14.6

​

​

—

​

​

—

​

​

14.6

​

​

—

​

Total

​

$

2,813.7

​

$

3.6

​

$

203.6

​

$

2,606.5

​

$

—

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 2023

​

​

Assets

​

Amount

​

Fair value hierarchy level

​

​

measured at

​

measured at

​

​

​

fair value

net asset value

Level 1

Level 2

Level 3

​

​

(in millions)

Asset category

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Pooled separate account investments:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

U.S. large cap equity portfolios (1)

​

$

290.9

​

$

—

​

$

—

​

$

290.9

​

$

—

​

U.S. small/mid cap equity portfolios (2)

​

49.5

​

​

—

​

—

​

49.5

​

—

​

Balanced asset portfolios (3)

​

97.0

​

​

—

​

—

​

97.0

​

—

​

International equity portfolios (4)

​

141.8

​

​

—

​

—

​

141.8

​

—

​

Fixed income security portfolios (5)

​

27.9

​

​

—

​

—

​

27.9

​

—

​

Real estate investment portfolios (6)

​

​

204.1

​

​

—

​

​

—

​

​

204.1

​

​

—

​

Single client separate account investments:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

Fixed income securities:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

U.S. government and agencies

​

​

124.9

​

​

—

​

​

124.9

​

​

—

​

​

—

​

States and political subdivisions

​

​

27.0

​

​

—

​

​

—

​

​

27.0

​

​

—

​

Corporate

​

​

1,394.2

​

​

—

​

​

—

​

​

1,394.2

​

​

—

​

Pooled separate account investment (8)

​

​

497.9

​

​

—

​

​

—

​

​

497.9

​

​

—

​

Other (9)

​

​

54.4

​

​

—

​

​

—

​

​

54.4

​

​

—

​

Total

​

$

2,909.6

​

$

—

​

$

124.9

​

$

2,784.7

​

$

—

​

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

(2) The portfolios invest primarily in publicly traded equity securities of mid-sized and small U.S. companies.

(3) The portfolios are a combination of underlying fixed income and equity investment options. These investment options may include balanced, asset allocation, target-date and target-risk investment options. Although typically lower risk than investment options that invest solely in equities, all investment options in this category have the potential to lose value.

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

(5) The portfolios invest primarily in 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.

(6) The portfolios invest primarily in U.S. commercial real estate properties through a separate account.

(7) The hedge funds have varying investment strategies that also have a variety of redemption terms and conditions. We do not have unfunded commitments associated with these hedge funds.

(8) The single client separate accounts invest in a money market pooled separate account.

(9) Includes cash, net derivative assets (liabilities) and net receivables (payables) for the single client separate accounts.

Target Asset Allocation (Table)

​

​	​	​	​
Asset category		Target allocation	​
Fixed income security portfolios	​	70	%
Equity portfolios	​	15	%
Private investments	​	15	%

​

Other postretirement benefits

Defined Benefit Plans and Other Postretirement Benefit Plans

Fair Value of Plan Assets (Table)

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 2024

​

​

​

Assets

​

Fair value hierarchy level

​

​

​

measured at

​

​

​

​

fair value

Level 1

Level 2

Level 3

​

​

(in millions)

​

Asset category

​

​

​

​

​

​

​

​

​

​

​

​

​

Cash and cash equivalents

​

$

1.0

​

$

1.0

​

$

—

​

$

—

​

Fixed income security portfolios (1)

​

48.6

​

48.6

​

—

​

—

​

U.S. equity portfolios (2)

​

38.7

​

38.7

​

—

​

—

​

International equity portfolios (3)

​

13.7

​

13.7

​

—

​

—

​

Total

​

$

102.0

​

$

102.0

​

$

—

​

$

—

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 2023

​

​

​

Assets

​

Fair value hierarchy level

​

​

​

measured at

​

​

​

​

fair value

Level 1

Level 2

Level 3

​

​

(in millions)

​

Asset category

​

​

​

​

​

​

​

​

​

​

​

​

​

Cash and cash equivalents

​

$

1.3

​

$

1.3

​

$

—

​

$

—

​

Fixed income security portfolios (1)

​

47.9

​

47.9

​

—

​

—

​

U.S. equity portfolios (2)

​

36.7

​

36.7

​

—

​

—

​

International equity portfolios (3)

​

13.9

​

13.9

​

—

​

—

​

Total

​

$

99.8

​

$

99.8

​

$

—

​

$

—

​

(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	%

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