Segment Information - Reconciliation of Income (Loss) from Operations by Segment to Consolidated Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Operating revenues	$ 4,726	$ 4,527	$ 9,411	$ 9,111
Interest credited	916	853	1,805	1,675
Interest and debt expense	(13)	86	67	167
Total federal income tax expense (benefit)	149	201	(78)	509
Reconciliation of total income (loss) from operations to net income (loss):
Net annuity product features, pre-tax (4)	405	252	(687)	1,702
Net life insurance product features, pre-tax	(58)	4	(15)	(128)
Credit loss-related adjustments, pre-tax	(25)	(34)	(53)	(36)
Investment gains (losses), pre-tax	(81)	(230)	(183)	(311)
Changes in the fair value of reinsurance-related embedded derivatives, trading securities and certain mortgage loans, pre-tax	14	201	(76)	395
Gains (losses) on other non-financial assets – sale of subsidiaries/businesses, pre-tax		584		584
Other items, pre-tax	75	(33)	40	(219)
Income tax benefit (expense) related to the above pre-tax items	(69)	(184)	199	(451)
Net income (loss)	699	895	(23)	2,116
Increase (decrease) in MRBs	932	126	(370)	2,021
Settlement of cost of insurance litigation, before tax				(114)
Severance expense for workforce realignment, before tax	(2)	(7)	(8)	(56)
Transaction and integration costs for acquisitions or divestiture, before tax	(18)	(27)	(38)	(37)
Deferred compensation mark-to-market adjustment, before tax	1	1	(8)	(12)
Gain (loss) on modification or early extinguishment of debt, pre-tax	94		94	0
Embedded Derivative Instruments
Reconciliation of total income (loss) from operations to net income (loss):
Change in fair value of derivatives	68	76	4	218
Qualifying Hedges
Segment Reporting Information [Line Items]
Interest and debt expense			67	167
Reconciliation of total income (loss) from operations to net income (loss):
Change in fair value of derivatives	(595)	50	(321)	(537)
Operating Segments and Corporate Non Segment
Segment Reporting Information [Line Items]
Operating revenues	4,726	4,527	9,411	9,111
Benefits and policyholder liability remeasurement (gain) loss	1,908	1,917	3,937	3,900
Interest credited	916	853	1,805	1,675
Commissions	570	521	1,127	1,020
General and administrative expenses	626	628	1,256	1,241
Interest and debt expense	81	86	161	167
Other	108	133	246	428
Total operating expenses	4,209	4,138	8,532	8,431
Total federal income tax expense (benefit)	79	54	127	100
Total income (loss) from operations	438	335	752	580
Other Operations
Segment Reporting Information [Line Items]
Operating revenues	41	39	94	66
Benefits and policyholder liability remeasurement (gain) loss	7	5	11	11
Interest credited	13	8	27	17
Commissions	0	0	0	0
General and administrative expenses	57	64	125	120
Interest and debt expense	81	86	161	167
Other	(1)	(2)	(2)	(7)
Total operating expenses	157	161	322	308
Total federal income tax expense (benefit)	(25)	(25)	(42)	(50)
Total income (loss) from operations	(91)	(97)	(186)	(192)
Annuities | Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	1,214	1,209	2,412	2,477
Benefits and policyholder liability remeasurement (gain) loss	32	40	60	67
Interest credited	439	377	858	729
Commissions	292	269	590	523
General and administrative expenses	126	116	251	236
Interest and debt expense	0	0	0	0
Other	(13)	56	(25)	253
Total operating expenses	876	858	1,734	1,808
Total federal income tax expense (benefit)	51	54	101	113
Total income (loss) from operations	287	297	577	556
Life Insurance | Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	1,602	1,511	3,188	3,052
Benefits and policyholder liability remeasurement (gain) loss	956	964	1,958	1,951
Interest credited	289	299	576	592
Commissions	111	113	210	226
General and administrative expenses	133	139	263	282
Interest and debt expense	0	0	0	0
Other	79	47	179	102
Total operating expenses	1,568	1,562	3,186	3,153
Total federal income tax expense (benefit)	2	(16)	(14)	(31)
Total income (loss) from operations	32	(35)	16	(70)
Group Protection | Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	1,538	1,441	3,059	2,867
Benefits and policyholder liability remeasurement (gain) loss	913	908	1,908	1,871
Interest credited	1	1	0	2
Commissions	139	113	272	222
General and administrative expenses	227	226	449	435
Interest and debt expense	0	0	0	0
Other	39	28	83	71
Total operating expenses	1,319	1,276	2,712	2,601
Total federal income tax expense (benefit)	46	35	73	56
Total income (loss) from operations	173	130	274	210
Retirement Plan Services | Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	331	327	658	649
Benefits and policyholder liability remeasurement (gain) loss	0	0	0	0
Interest credited	174	168	344	335
Commissions	28	26	55	49
General and administrative expenses	83	83	168	168
Interest and debt expense	0	0	0	0
Other	4	4	11	9
Total operating expenses	289	281	578	561
Total federal income tax expense (benefit)	5	6	9	12
Total income (loss) from operations	$ 37	$ 40	$ 71	$ 76