Mortgage Loans, Sorted by Applicable Credit Quality Indicators (Detail) - USD ($)
$ in Millions |
Mar. 31, 2025 |
Dec. 31, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
|
$ (16.6)
|
$ (16.1)
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
2,187.7
|
2,224.5
|
|
|
| Loan to Value Ratio Below or Equal to 65 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
1,585.8
|
1,639.6
|
|
|
| Loan To Value Ratio Above 65 To 75 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
362.2
|
367.6
|
|
|
| Loan To Value Ratio Above 75 To 85 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
192.6
|
152.3
|
|
|
| Loan To Value Ratio Above 85 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
47.1
|
65.0
|
|
|
| Originated Five or More Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
1,618.7
|
1,541.0
|
|
|
| Originated Four Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
327.3
|
154.2
|
|
|
| Originated Three Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
86.9
|
329.6
|
|
|
| Originated Two Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
66.2
|
87.3
|
|
|
| Originated in Fiscal Year before Latest Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
45.9
|
66.4
|
|
|
| Originated in Current Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
[1] |
42.7
|
46.0
|
|
|
| AA Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
|
93.6
|
117.8
|
|
|
| A Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
|
1,066.3
|
1,099.1
|
|
|
| BBB Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
|
927.9
|
915.5
|
|
|
| BB Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
|
84.3
|
85.0
|
|
|
| B Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Mortgage Loans, Carrying Amount |
|
15.6
|
7.1
|
|
|
| Commercial Real Estate |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
[1] |
1,633.3
|
1,554.7
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
[1] |
328.3
|
154.7
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
[1] |
87.2
|
330.6
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
[1] |
66.6
|
87.6
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
[1] |
46.1
|
66.8
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
[1] |
42.8
|
46.2
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
[1] |
2,204.3
|
2,240.6
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(16.6)
|
(16.1)
|
$ (10.7)
|
$ (10.2)
|
| Commercial Real Estate | Loan to Value Ratio Below or Equal to 65 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
[1] |
1,281.7
|
1,229.6
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
[1] |
192.1
|
112.9
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
[1] |
40.5
|
210.0
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
[1] |
38.6
|
40.8
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
[1] |
11.7
|
38.7
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
[1] |
25.0
|
11.7
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
[1] |
1,589.6
|
1,643.7
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(3.8)
|
(4.2)
|
(3.6)
|
(3.8)
|
| Commercial Real Estate | Loan To Value Ratio Above 65 To 75 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
[1] |
173.9
|
154.1
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
[1] |
63.1
|
33.7
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
[1] |
46.7
|
72.1
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
[1] |
28.0
|
46.8
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
[1] |
34.4
|
28.1
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
[1] |
17.8
|
34.5
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
[1] |
363.9
|
369.3
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(1.7)
|
(1.7)
|
(3.4)
|
(3.8)
|
| Commercial Real Estate | Loan To Value Ratio Above 75 To 85 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
[1] |
133.4
|
126.4
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
[1] |
62.3
|
8.1
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
[1] |
0.0
|
20.1
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
[1] |
195.7
|
154.6
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(3.1)
|
(2.2)
|
(1.2)
|
(1.2)
|
| Commercial Real Estate | Loan To Value Ratio Above 85 Percent |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
[1] |
44.3
|
44.6
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
[1] |
10.8
|
0.0
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
[1] |
0.0
|
28.4
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
[1] |
0.0
|
0.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
[1] |
55.1
|
73.0
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(8.0)
|
(8.0)
|
$ (2.5)
|
$ (1.4)
|
| Commercial Real Estate | Originated Five or More Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(14.6)
|
(13.7)
|
|
|
| Commercial Real Estate | Originated Four Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(1.0)
|
(0.5)
|
|
|
| Commercial Real Estate | Originated Three Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(0.3)
|
(1.0)
|
|
|
| Commercial Real Estate | Originated Two Years before Last Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(0.4)
|
(0.3)
|
|
|
| Commercial Real Estate | Originated in Fiscal Year before Latest Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(0.2)
|
(0.4)
|
|
|
| Commercial Real Estate | Originated in Current Fiscal Year |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Allowance for Credit Losses, Mortgage Loans |
[1] |
(0.1)
|
(0.2)
|
|
|
| Commercial Real Estate | AA Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
|
87.4
|
111.5
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
|
6.3
|
0.0
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
|
0.0
|
6.4
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
|
93.7
|
117.9
|
|
|
| Commercial Real Estate | A Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
|
835.2
|
780.5
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
|
167.9
|
99.6
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
|
24.4
|
169.1
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
|
9.5
|
24.6
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
|
6.5
|
9.5
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
|
25.0
|
18.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
|
1,068.5
|
1,101.3
|
|
|
| Commercial Real Estate | BBB Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
|
601.2
|
561.7
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
|
154.1
|
55.1
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
|
62.8
|
155.1
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
|
57.1
|
63.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
|
39.6
|
57.3
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
|
17.8
|
28.2
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
|
932.6
|
920.4
|
|
|
| Commercial Real Estate | BB Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
|
86.1
|
86.8
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
|
86.1
|
86.8
|
|
|
| Commercial Real Estate | B Credit Rating |
|
|
|
|
|
| Mortgage Loans on Real Estate |
|
|
|
|
|
| Financing Receivable, Originated Five or More Years before Latest Fiscal Year |
|
23.4
|
14.2
|
|
|
| Financing Receivable, Originated Four Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated Three Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated Two Years before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, Originated in Current Fiscal Year |
|
0.0
|
0.0
|
|
|
| Financing Receivable, before Allowance for Credit Loss |
|
$ 23.4
|
$ 14.2
|
|
|
|
|