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Investments - Mortgage Loan Valuation Allowance (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Changes in financing receivable valuation allowance
Beginning balance, Financing receivable valuation allowance	$ 71.0	$ 49.8	$ 49.0	$ 52.9
Provision: Financing receivable valuation allowance	(3.5)	(7.5)	18.1	(11.5)
Charge-offs: Financing receivable valuation allowance		(0.2)	(0.1)	(0.3)
Recoveries: Financing receivable valuation allowance	1.0	0.7	1.4	1.7
Foreign currency translation adjustment	(0.3)	(0.1)	(0.2)	(0.1)
Ending balance, Financing receivable valuation allowance	68.2	42.7	$ 68.2	42.7
Commercial mortgage loans
Financing receivable valuation allowance disclosures
Mortgage loans, Days delinquent to be analyzed for valuation allowance			60 days
Changes in financing receivable valuation allowance
Beginning balance, Financing receivable valuation allowance	66.1	43.1	$ 43.9	43.2
Provision: Financing receivable valuation allowance	(2.2)	(6.4)	19.9	(6.5)
Recoveries: Financing receivable valuation allowance	0.0
Foreign currency translation adjustment	(0.3)	(0.1)	(0.2)	(0.1)
Ending balance, Financing receivable valuation allowance	63.6	36.6	63.6	36.6
Direct financing leases
Changes in financing receivable valuation allowance
Beginning balance, Financing receivable valuation allowance	0.4	0.1	0.4	0.1
Provision: Financing receivable valuation allowance	(0.1)	0.2	(0.1)	0.2
Recoveries: Financing receivable valuation allowance	0.0
Ending balance, Financing receivable valuation allowance	0.3	0.3	$ 0.3	0.3
Residential mortgage loans
Financing receivable valuation allowance disclosures
Mortgage loans, Days delinquent to be analyzed for valuation allowance			60 days
Changes in financing receivable valuation allowance
Beginning balance, Financing receivable valuation allowance	1.8	3.9	$ 2.0	6.9
Provision: Financing receivable valuation allowance	(1.1)	(1.2)	(1.6)	(5.1)
Charge-offs: Financing receivable valuation allowance		(0.2)	(0.1)	(0.3)
Recoveries: Financing receivable valuation allowance	1.0	0.7	1.4	1.7
Ending balance, Financing receivable valuation allowance	1.7	3.2	1.7	3.2
Reinsurance recoverables
Changes in financing receivable valuation allowance
Beginning balance, Financing receivable valuation allowance	2.7	2.7	2.7	2.7
Provision: Financing receivable valuation allowance	(0.1)	(0.1)	(0.1)	(0.1)
Recoveries: Financing receivable valuation allowance	0.0
Ending balance, Financing receivable valuation allowance	$ 2.6	$ 2.6	$ 2.6	$ 2.6

X

- Definition

The numbers of days for which a mortgage loan has been delinquent such that it is analyzed to determine if a valuation allowance is needed.

+ References

No definition available.

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X

- Definition

Amount of foreign currency translation adjustment increasing or decreasing the valuation allowance for financing receivables.

+ References

No definition available.

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X

- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
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- Definition

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- Definition

Amount of increase in allowance for credit loss on financing receivable from recovery.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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- Definition

Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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