Fair Value - Gross Components of Purchases, Sales, Issuances and Settlements, net (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	$ 5,418		$ 2,153	$ 12,658	$ 2,799
Issuances	0		0	0	0
Sales	(1,416)		(63)	(3,734)	(800)
Settlements	(3,197)		(1,214)	(4,746)	(420)
Purchases, (Sales), Issuances, (Settlements)	805	$ 4,178	876	4,178	1,579
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	5,008		225	17,402	424
Transfers (out)	(13,463)		(352)	(19,793)	(590)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(8,455)	(2,391)	(127)	(2,391)	(166)
Purchases	0		0	0	0
Issuances	(361)		(197)	(616)	(372)
Sales	0		0	0	0
Settlements	(127)		(218)	(280)	(458)
Purchases, (Sales), Issuances, (Settlements), Liabilities	(234)	(336)	21	(336)	86
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0		0	0	0
Transfers (out)	0		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	0	0	0	0	0
Short-term Investments [Member] | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	29			59	0
Sales	0			0	0
Settlements	(29)			(29)	0
Purchases, (Sales), Issuances, (Settlements)	0			30	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			0	0
Transfers (out)	0			0	(2)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0			0	(2)
Short-term Investments [Member] | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0			53
Sales	0			0
Settlements	0			0
Purchases, (Sales), Issuances, (Settlements)	0			53
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			0
Transfers (out)	(53)			(53)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(53)			(53)
Trading securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases					40
Sales					(39)
Settlements					0
Purchases, (Sales), Issuances, (Settlements)	2		5	8	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3					23
Transfers (out)					(3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(33)		5	(13)	20
Trading securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	7		113	36	236
Sales	(787)		0	(1,052)	(1)
Settlements	(28)		(82)	(46)	(73)
Purchases, (Sales), Issuances, (Settlements)	(808)	(1,062)	31	(1,062)	162
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	1,443		12	1,443	0
Transfers (out)	0		(19)	(1,260)	(29)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	1,443	183	(7)	183	(29)
Trading securities | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0			0
Sales	0			0
Settlements	0			0
Purchases, (Sales), Issuances, (Settlements)	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	330			330
Transfers (out)	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	330			330
Trading securities | Investments, excluding investments in Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	2		40	8
Sales	0		(35)	0
Settlements	0		0	0
Purchases, (Sales), Issuances, (Settlements)	2		5	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	9		7	39
Transfers (out)	(42)		(2)	(52)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(33)		5	(13)
Equity securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	(3)	(3)	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(381)	(381)	0		0
Equity securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0		11	0	45
Sales	(119)		0	(119)	0
Settlements	0		(2)	0	(3)
Purchases, (Sales), Issuances, (Settlements)	(119)	(119)	9	(119)	42
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	125		0	125	0
Transfers (out)	0		0	(113)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	125	12	0	12	0
Equity securities | Investments, excluding investments in Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0			0
Sales	(3)			(3)
Purchases, (Sales), Issuances, (Settlements)	(3)			(3)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	19			19
Transfers (out)	(400)			(400)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(381)			(381)
Investment funds | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0		0
Investment funds | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases				0
Sales				(34)
Settlements				0
Purchases, (Sales), Issuances, (Settlements)	0	(34)	0	(34)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0
Transfers (out)				(2,031)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	(2,031)	0	(2,031)	0
Investment funds | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	33		250	286	293
Sales	(110)		0	(125)	0
Settlements	0		0	0	0
Purchases, (Sales), Issuances, (Settlements)	(77)	161	250	161	293
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	1,006		0	11,087	109
Transfers (out)	(10,486)		0	(11,520)	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(9,480)	(433)	0	(433)	109
Other | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	31			31
Sales	0			0
Settlements	0			0
Purchases, (Sales), Issuances, (Settlements)	31	31		31
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			1,902
Transfers (out)	(1,902)			(1,902)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(1,902)	0		0
U.S. state, municipal and political subdivisions | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases					0
Sales					0
Settlements					(1)
Purchases, (Sales), Issuances, (Settlements)					(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3					0
Transfers (out)					(32)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net					(32)
Foreign governments | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases			1		1
Sales			0		0
Settlements			(1)		(1)
Purchases, (Sales), Issuances, (Settlements)	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3			0		0
Transfers (out)			0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0		0
Corporate | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	129		132	453	110
Sales	(2)		(8)	(170)	(9)
Settlements	(87)		(50)	(103)	(45)
Purchases, (Sales), Issuances, (Settlements)	40	180	74	180	56
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	150		203	193	235
Transfers (out)	(43)		(86)	(44)	(115)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	107	149	117	149	120
Corporate | Available-for-sale Securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	52		0	367	0
Sales	0		0	(217)	0
Settlements	(10)		0	(14)	0
Purchases, (Sales), Issuances, (Settlements)	42	136	0	136	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	53		0	53	0
Transfers (out)	0		(201)	0	(201)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	53	53	(201)	53	(201)
CLO | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0		110	0	110
Sales	0		0	0	0
Settlements	(2)		(8)	(12)	(43)
Purchases, (Sales), Issuances, (Settlements)	(2)	(12)	102	(12)	67
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0	0	0
Transfers (out)	0		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0	0	0
CLO | Available-for-sale Securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	130
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0
CLO | Available-for-sale Securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases				130
Sales				0
Settlements				0
Purchases, (Sales), Issuances, (Settlements)				130
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3				0
Transfers (out)				0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net				0
RMBS | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	68			68
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0			0
RMBS | Available-for-sale Securities | Investments, excluding investments in Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	68			68
Settlements	0			0
Purchases, (Sales), Issuances, (Settlements)	68			68
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			0
Transfers (out)	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0			0
ABS | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	746		1,128	2,235	935
Sales	(341)		(20)	(1,791)	0
Settlements	(257)		(804)	(444)	(192)
Purchases, (Sales), Issuances, (Settlements)	148	0	304	0	743
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	30		3	368	57
Transfers (out)	(304)		(44)	(305)	(147)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(274)	63	(41)	63	(90)
ABS | Available-for-sale Securities | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	899		365	1,273	1,026
Sales	(6)		0	(93)	(751)
Settlements	(1,989)		(266)	(2,421)	(61)
Purchases, (Sales), Issuances, (Settlements)	(1,096)	(1,241)	99	(1,241)	214
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	1,822		0	1,822	0
Transfers (out)	0		0	(1,864)	(61)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	1,822	(42)	0	(42)	(61)
CMBS | Available-for-sale Securities | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0		3	0
Sales	0		0	0
Settlements	0		(1)	0
Purchases, (Sales), Issuances, (Settlements)	0	0	2	0	3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0		0	0
Transfers (out)	(10)		0	(26)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(10)	(26)	0	(26)	0
CMBS | Available-for-sale Securities | Investments, excluding investments in Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases					3
Sales					0
Settlements					0
Purchases, (Sales), Issuances, (Settlements)					3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3					0
Transfers (out)					0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net					0
Mortgage loans | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	3,386			7,477	0
Sales	(48)			(130)	0
Settlements	(789)			(1,512)	(1)
Purchases, (Sales), Issuances, (Settlements)	2,549	5,835	0	5,835	(1)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			0	0
Transfers (out)	0			0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0	0	0
Mortgage loans | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	36			182
Sales	0			0
Settlements	(4)			(11)
Purchases, (Sales), Issuances, (Settlements)	32	171		171
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	0			0
Transfers (out)	0			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0		0
Mortgage loans | Variable Interest Entities
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0			0
Sales	0			0
Settlements	(2)			(154)
Purchases, (Sales), Issuances, (Settlements)	(2)	(154)		(154)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3	21			21
Transfers (out)	(223)			(223)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(202)	(202)		(202)
Short-term Investments [Member] | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	30			0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0			(2)
Short-term Investments [Member] | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	53
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	(53)	(53)
Reinsurance Recoverable Including Reinsurance Premium Paid [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0		0
Embedded derivatives | Funds withheld at interest | Consolidated Entity, excluding Affiliated Entity
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0		0
Embedded derivatives | Funds withheld at interest | Related Party
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements)	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	0	0	0		0
Interest sensitive contract liabilities | Embedded derivatives
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases	0		0	0	0
Issuances	(361)		(197)	(616)	(372)
Sales	0		0	0	0
Settlements	(127)		(218)	(280)	(458)
Purchases, (Sales), Issuances, (Settlements), Liabilities	(234)		21	(336)	86
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	0		0	0	0
Transfers (out)	0		0	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	0	0	0	$ 0	0
Derivative Financial Instruments, Liabilities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Purchases, (Sales), Issuances, (Settlements), Liabilities	0	0	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net	$ 0	$ 0	$ 0		$ 0