Fair Value (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Assets and liabilities measured at fair value on a recurring basis

Assets and liabilities measured at fair value on a recurring basis are presented in the following tables. Corporate bonds and other includes obligations of the U.S. Treasury, government-sponsored enterprises and foreign governments and redeemable preferred stock.

March 31, 2018								Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2			Level 3
Assets
Fixed maturity securities:
Corporate bonds and other	$	167	$	18,917		$	100	$	19,184
States, municipalities and political subdivisions	—		12,876			1		12,877
Asset-backed	—		7,919			279		8,198
Total fixed maturity securities	167		39,712			380		40,259
Equity securities:
Common stock	83		—			4		87
Non-redeemable preferred stock	67		602			14		683
Total equity securities	150		602			18		770
Short term and other	156		978			—		1,134
Total assets	$	473	$	41,292		$	398	$	42,163
Liabilities
Other liabilities	$	—	$	(1	)	$	—	$	(1	)
Total liabilities	$	—	$	(1	)	$	—	$	(1	)

December 31, 2017							Total Assets/Liabilities at Fair Value
(In millions)	Level 1		Level 2		Level 3
Assets
Fixed maturity securities:
Corporate bonds and other	$	128	$	19,148	$	98	$	19,374
States, municipalities and political subdivisions	—		14,026		1		14,027
Asset-backed	—		7,751		335		8,086
Total fixed maturity securities	128		40,925		434		41,487
Equity securities:
Common stock	23		—		4		27
Non-redeemable preferred stock	68		584		16		668
Total equity securities	91		584		20		695
Short term and other	396		958		—		1,354
Total assets	$	615	$	42,467	$	454	$	43,536
Liabilities
Other liabilities	$	—	$	3	$	—	$	3
Total liabilities	$	—	$	3	$	—	$	3

Table of reconciliation for assets and liablities measured at fair value on a recurring basis using significant unobservable inputs

The tables below present a reconciliation for all assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3).

Level 3 (In millions)	Corporate bonds and other			States, municipalities and political subdivisions		Asset-backed			Equity securities			Derivative financial instruments		Total
Balance as of January 1, 2018	$	98		$	1	$	335		$	20		$	—	$	454
Total realized and unrealized investment gains (losses):
Reported in Net realized investment gains (losses)	(1		)	—		7			(2		)	—		4
Reported in Net investment income	—			—		—			—			—		—
Reported in Other comprehensive income	—			—		(5		)	—			—		(5		)
Total realized and unrealized investment gains (losses)	(1		)	—		2			(2		)	—		(1		)
Purchases	—			—		30			—			—		30
Sales	—			—		(72		)	—			—		(72		)
Settlements	(2		)	—		(6		)	—			—		(8		)
Transfers into Level 3	5			—		—			—			—		5
Transfers out of Level 3	—			—		(10		)	—			—		(10		)
Balance as of March 31, 2018	$	100		$	1	$	279		$	18		$	—	$	398
Unrealized gains (losses) on Level 3 assets and liabilities held as of March 31, 2018 recognized in Net income (loss)	$	—		$	—	$	—		$	(2	)	$	—	$	(2	)

Level 3 (In millions)	Corporate bonds and other			States, municipalities and political subdivisions		Asset-backed			Equity securities			Derivative financial instruments			Life settlement contracts			Total
Balance as of January 1, 2017	$	130		$	1	$	199		$	19		$	—		$	58		$	407
Total realized and unrealized investment gains (losses):
Reported in Net realized investment gains (losses)	—			—		—			—			1			—			1
Reported in Other revenues	—			—		—			—			—			6			6
Reported in Other comprehensive income	1			—		2			1			—			—			4
Total realized and unrealized investment gains (losses)	1			—		2			1			1			6			11
Purchases	5			—		38			1			—			—			44
Sales	(1		)	—		—			(2		)	(1		)	(13		)	(17		)
Settlements	(14		)	—		(6		)	—			—			(5		)	(25		)
Transfers into Level 3	—			—		28			—			—			—			28
Transfers out of Level 3	—			—		(5		)	—			—			—			(5		)
Balance as of March 31, 2017	$	121		$	1	$	256		$	19		$	—		$	46		$	443
Unrealized gains (losses) on Level 3 assets and liabilities held as of March 31, 2017 recognized in Net income (loss)	$	—		$	—	$	—		$	—		$	—		$	—		$	—

Quantitative information about significant unobservable inputs in the fair value measurement of level 3 assets

The following tables present quantitative information about the significant unobservable inputs utilized by the Company in the fair value measurements of Level 3 assets. Valuations for assets and liabilities not presented in the tables below are primarily based on broker/dealer quotes for which there is a lack of transparency as to inputs used to develop the valuations. The quantitative detail of these unobservable inputs is neither provided nor reasonably available to the Company.

March 31, 2018	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	133	Discounted cash flow	Credit spread	1% - 12% (3%)

December 31, 2017	Estimated Fair Value (In millions)		Valuation Technique(s)	Unobservable Input(s)	Range  (Weighted Average)
Fixed maturity securities	$	136	Discounted cash flow	Credit spread	1% - 12% (3%)

Carrying amount and estimated fair value of financial instrument assets and liabilities not measured at fair value

The carrying amount and estimated fair value of the Company's financial assets and liabilities which are not measured at fair value on the Condensed Consolidated Balance Sheets are presented in the following tables.

March 31, 2018	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	864	$	—	$	—	$	856	$	856
Note receivable	34		—		—		34		34
Liabilities
Short term debt	$	30	$	—	$	30	$	—	$	30
Long term debt	2,679		—		2,786		—		2,786

December 31, 2017	Carrying Amount		Estimated Fair Value
(In millions)			Level 1		Level 2		Level 3		Total
Assets
Mortgage loans	$	839	$	—	$	—	$	844	$	844
Note receivable	46		—		—		46		46
Liabilities
Short term debt	$	150	$	—	$	150	$	—	$	150
Long term debt	2,708		—		2,896		—		2,896