Assets as a percent of total assets measured at fair value on a recurring and non-recurring basis.

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Represents the counterparty and cash collateral netting as a percent of total liabilities measured at fair value on a recurring and non-recurring basis.

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Represents the amount of derivative assets, net of offsets under the master netting arrangements and net of securities collateral.

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Free Standing Derivative Assets, Derivative Asset, Fair Value, Gross Asset and Right to Reclaim Cash, Offset

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Represents the fair values as of the balance sheet date of all assets resulting from free-standing derivative contracts.

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Represents the fair values as of the balance sheet date of all liabilities resulting from free-standing derivative contracts.

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Liabilities as a percent of total liabilities measured at fair value on a recurring and non-recurring basis.

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Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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Fair value portion of other assets.

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Amount of asset at fair value held for benefit of separate account policyholder.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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Fair Value of Assets and Liabilities - Assets and liabilities measured at fair value on a recurring and non-recurring basis (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets
Fixed income securities:	$ 59,259	$ 57,170
Equity securities	8,206	5,036
Short-term investments	5,254	3,027
Other investments: Free-standing derivatives			$ 1
Separate account assets	2,942	2,805
Counterparty and cash collateral netting	$ (52)	$ (23)
% of total assets at fair value	(0.10%)	0.00%
Total	$ 77,557	$ 69,936
Liabilities
Counterparty and cash collateral netting	$ 5	$ 6
Counterparty and cash collateral netting as a percent of liabilities measured at fair value	(1.00%)	(2.10%)
U.S. government and agencies
Assets
Fixed income securities:	$ 4,111	$ 5,517
Municipal
Assets
Fixed income securities:	8,838	9,169
Foreign government
Assets
Fixed income securities:	993	747
Residential mortgage-backed securities (“RMBS”)
Assets
Fixed income securities:	392	464
Commercial mortgage-backed securities (“CMBS”)
Assets
Fixed income securities:	64	70
Redeemable preferred stock
Assets
Fixed income securities:	21	$ 22
Quoted prices in active markets for identical assets (Level 1)
Assets
Total assets at fair value	$ 16,633
% of total assets at fair value	22.00%	19.90%
Liabilities
Total recurring basis liabilities	$ (1)	$ (1)
Liabilities as a percent of liabilities measured at fair value	0.20%	0.30%
Significant other observable inputs (Level 2)
Assets
Total assets at fair value	$ 58,448
% of total assets at fair value	77.10%	79.10%
Liabilities
Total recurring basis liabilities	$ (59)	$ (62)
Liabilities as a percent of liabilities measured at fair value	11.60%	22.10%
Significant unobservable inputs (Level 3)
Assets
Total assets at fair value	$ 767
% of total assets at fair value	1.00%	1.00%
Liabilities
Total recurring basis liabilities	$ (454)	$ (224)
Liabilities as a percent of liabilities measured at fair value	89.20%	79.70%
Investments reported at NAV
Assets
Investments reported at NAV	$ 1,761	$ 1,779
Recurring
Assets
Other investments: Free-standing derivatives, Counterparty and cash collateral netting	(52)	(23)
Liabilities
Counterparty and cash collateral netting	5	6
Recurring \| Quoted prices in active markets for identical assets (Level 1)
Assets
Fixed income securities:	3,707	5,085
Equity securities	7,453	4,364
Short-term investments	2,530	1,338
Other investments: Free-standing derivatives	0	0
Separate account assets	2,942	2,805
Other assets	1	2
Total assets at fair value	16,633	13,594
Liabilities
Other liabilities: Free-standing derivatives	(1)	(1)
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| U.S. government and agencies
Assets
Fixed income securities:	3,707	5,085
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Municipal
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Corporate - public
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Corporate - privately placed
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Foreign government
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| ABS - CDO
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| ABS - consumer and other
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Residential mortgage-backed securities (“RMBS”)
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Commercial mortgage-backed securities (“CMBS”)
Assets
Fixed income securities:	0	0
Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Redeemable preferred stock
Assets
Fixed income securities:	0	0
Recurring \| Significant other observable inputs (Level 2)
Assets
Fixed income securities:	55,185	51,760
Equity securities	368	331
Short-term investments	2,709	1,659
Other investments: Free-standing derivatives	186	139
Separate account assets	0	0
Other assets	0	0
Total assets at fair value	58,448	53,889
Liabilities
Other liabilities: Free-standing derivatives	(59)	(62)
Recurring \| Significant other observable inputs (Level 2) \| U.S. government and agencies
Assets
Fixed income securities:	404	432
Recurring \| Significant other observable inputs (Level 2) \| Municipal
Assets
Fixed income securities:	8,774	9,099
Recurring \| Significant other observable inputs (Level 2) \| Corporate - public
Assets
Fixed income securities:	31,538	29,200
Recurring \| Significant other observable inputs (Level 2) \| Corporate - privately placed
Assets
Fixed income securities:	12,289	10,776
Recurring \| Significant other observable inputs (Level 2) \| Foreign government
Assets
Fixed income securities:	993	747
Recurring \| Significant other observable inputs (Level 2) \| ABS - CDO
Assets
Fixed income securities:	297	263
Recurring \| Significant other observable inputs (Level 2) \| ABS - consumer and other
Assets
Fixed income securities:	447	713
Recurring \| Significant other observable inputs (Level 2) \| Residential mortgage-backed securities (“RMBS”)
Assets
Fixed income securities:	392	464
Recurring \| Significant other observable inputs (Level 2) \| Commercial mortgage-backed securities (“CMBS”)
Assets
Fixed income securities:	30	44
Recurring \| Significant other observable inputs (Level 2) \| Redeemable preferred stock
Assets
Fixed income securities:	21	22
Recurring \| Significant unobservable inputs (Level 3)
Assets
Fixed income securities:	367	325
Equity securities	385	341
Short-term investments	15	30
Other investments: Free-standing derivatives	0	1
Separate account assets	0	0
Other assets	0	0
Total assets at fair value	767	697
Liabilities
Other liabilities: Free-standing derivatives	0	0
Recurring \| Significant unobservable inputs (Level 3) \| U.S. government and agencies
Assets
Fixed income securities:	0	0
Recurring \| Significant unobservable inputs (Level 3) \| Municipal
Assets
Fixed income securities:	64	70
Recurring \| Significant unobservable inputs (Level 3) \| Corporate - public
Assets
Fixed income securities:	104	70
Recurring \| Significant unobservable inputs (Level 3) \| Corporate - privately placed
Assets
Fixed income securities:	87	90
Recurring \| Significant unobservable inputs (Level 3) \| Foreign government
Assets
Fixed income securities:	0	0
Recurring \| Significant unobservable inputs (Level 3) \| ABS - CDO
Assets
Fixed income securities:	63	6
Recurring \| Significant unobservable inputs (Level 3) \| ABS - consumer and other
Assets
Fixed income securities:	15	63
Recurring \| Significant unobservable inputs (Level 3) \| Residential mortgage-backed securities (“RMBS”)
Assets
Fixed income securities:	0	0
Recurring \| Significant unobservable inputs (Level 3) \| Commercial mortgage-backed securities (“CMBS”)
Assets
Fixed income securities:	34	26
Recurring \| Significant unobservable inputs (Level 3) \| Redeemable preferred stock
Assets
Fixed income securities:	0	0
Contractholder funds: Derivatives embedded in life and annuity contracts \| Recurring \| Quoted prices in active markets for identical assets (Level 1)
Liabilities
Contractholder funds: Derivatives embedded in life and annuity contracts	0	0
Contractholder funds: Derivatives embedded in life and annuity contracts \| Recurring \| Significant other observable inputs (Level 2)
Liabilities
Contractholder funds: Derivatives embedded in life and annuity contracts	0	0
Contractholder funds: Derivatives embedded in life and annuity contracts \| Recurring \| Significant unobservable inputs (Level 3)
Liabilities
Contractholder funds: Derivatives embedded in life and annuity contracts	(454)	$ (224)
Fair value
Assets
Total assets at fair value	$ 75,796
% of total assets at fair value	100.00%	100.00%
Liabilities
Total recurring basis liabilities	$ (509)	$ (281)
Liabilities as a percent of liabilities measured at fair value	100.00%	100.00%
Fair value \| Recurring
Assets
Fixed income securities:	$ 59,259	$ 57,170
Equity securities	8,206	5,036
Short-term investments	5,254	3,027
Other investments: Free-standing derivatives	134	117
Separate account assets	2,942	2,805
Other assets	1	2
Total assets at fair value	75,796	68,157
Liabilities
Other liabilities: Free-standing derivatives	(55)	(57)
Fair value \| Recurring \| U.S. government and agencies
Assets
Fixed income securities:	4,111	5,517
Fair value \| Recurring \| Municipal
Assets
Fixed income securities:	8,838	9,169
Fair value \| Recurring \| Corporate - public
Assets
Fixed income securities:	31,642	29,270
Fair value \| Recurring \| Corporate - privately placed
Assets
Fixed income securities:	12,376	10,866
Fair value \| Recurring \| Foreign government
Assets
Fixed income securities:	993	747
Fair value \| Recurring \| ABS - CDO
Assets
Fixed income securities:	360	269
Fair value \| Recurring \| ABS - consumer and other
Assets
Fixed income securities:	462	776
Fair value \| Recurring \| Residential mortgage-backed securities (“RMBS”)
Assets
Fixed income securities:	392	464
Fair value \| Recurring \| Commercial mortgage-backed securities (“CMBS”)
Assets
Fixed income securities:	64	70
Fair value \| Recurring \| Redeemable preferred stock
Assets
Fixed income securities:	21	22
Fair value \| Contractholder funds: Derivatives embedded in life and annuity contracts \| Recurring
Liabilities
Contractholder funds: Derivatives embedded in life and annuity contracts	(454)	(224)
Fixed Income Securities Valued Based on Nonbinding Broker Quotes
Assets
Total assets at fair value	87	105
Municipal Not Rated by Third Party Credit Rating Agencies
Assets
Total assets at fair value	$ 37	$ 44