XML 51 R40.htm IDEA: XBRL DOCUMENT v3.21.2

INVESTMENTS - SCHEDULE OF AMORTIZED COST, GROSS UNREALIZED GAINS AND LOSSES, ESTIMATED FAIR VALUE, AND ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($) $ in Millions	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized cost	$ 20,698.0		$ 19,921.1
Allowance for credit losses	(2.3)	$ (5.3)	(2.2)	$ (10.8)	$ (19.9)		$ (2.1)
Estimated fair value	23,806.6		23,383.6			$ 21,293.1
Corporate securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	12,888.6		12,054.7
Gross unrealized gains	2,370.5		2,696.3
Gross unrealized losses	(13.3)		(9.9)
Allowance for credit losses	(2.3)	(4.9)	(1.9)	(10.0)	(18.2)		(2.1)
Estimated fair value	15,243.5		14,739.2
United States Treasury securities and obligations of United States government corporations and agencies
Debt Securities, Available-for-sale [Line Items]
Amortized cost	164.3		163.8
Gross unrealized gains	51.0		71.9
Gross unrealized losses	(0.7)		(0.2)
Allowance for credit losses	0.0		0.0
Estimated fair value	214.6		235.5
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized cost	2,454.7		2,296.6
Gross unrealized gains	346.7		358.9
Gross unrealized losses	(0.5)		(1.3)
Allowance for credit losses	0.0	$ (0.4)	(0.3)	(0.5)	(0.6)		0.0
Estimated fair value	2,800.9		2,653.9
Foreign governments
Debt Securities, Available-for-sale [Line Items]
Amortized cost	67.0		82.4
Gross unrealized gains	13.0		20.4
Gross unrealized losses	0.0		0.0
Allowance for credit losses	0.0		0.0	0.0	(0.1)		0.0
Estimated fair value	80.0		102.8
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	962.5		1,024.4
Gross unrealized gains	50.8		45.1
Gross unrealized losses	(1.2)		(7.4)
Allowance for credit losses	0.0		0.0	(0.3)	0.0		0.0
Estimated fair value	1,012.1		1,062.1
Agency residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	44.7		52.7
Gross unrealized gains	4.9		5.7
Gross unrealized losses	0.0		0.0
Allowance for credit losses	0.0		0.0
Estimated fair value	49.6		58.4
Non-agency residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,732.3		1,913.5
Gross unrealized gains	173.2		181.2
Gross unrealized losses	(0.2)		(2.1)
Allowance for credit losses	0.0		0.0	$ 0.0	$ (1.0)		$ 0.0
Estimated fair value	1,905.3		2,092.6
Collateralized loan obligations
Debt Securities, Available-for-sale [Line Items]
Amortized cost	457.8		461.9
Gross unrealized gains	2.5		0.6
Gross unrealized losses	(0.7)		(3.6)
Allowance for credit losses	0.0		0.0
Estimated fair value	459.6		458.9
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized cost	1,926.1		1,871.1
Gross unrealized gains	116.4		116.4
Gross unrealized losses	(1.5)		(7.3)
Allowance for credit losses	0.0		0.0
Estimated fair value	2,041.0		1,980.2
Total fixed maturities, available for sale
Debt Securities, Available-for-sale [Line Items]
Amortized cost	20,698.0		19,921.1
Gross unrealized gains	3,129.0		3,496.5
Gross unrealized losses	(18.1)		(31.8)
Allowance for credit losses	(2.3)		(2.2)
Estimated fair value	$ 23,806.6		$ 23,383.6

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

+ Details

Name:	us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: