Segment Information - Reconciliation of Net Income (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended
	Jul. 01, 2023	Jun. 30, 2023	Jun. 30, 2022		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2022
Segment Reporting Information [Line Items]
Pretax adjusted operating earnings	$ 4,139	$ 1,465	$ 4,139	[1]	$ (589)	$ 6,752	$ 6,752	[1]
Guaranteed Benefits And Hedging Results [Abstract]
Net movement in freestanding derivatives					(4,730)		1,497	[2]
Market risk benefits gains (losses), net	(1,184)	2,570	(1,184)	[1]	2,744	723	723	[1]
Net realized investment gains (losses)					(108)		(125)	[2]
Net investment income on funds withheld assets		252	364	[1]	559		624	[1]
Pretax income (loss) attributable to Jackson Financial Inc		1,462	4,108		(593)		6,690
Income tax expense (benefit)	845	245	845	[1]	(313)	1,233	1,233	[1]
Net income (loss) attributable to Jackson Financial Inc.	$ 3,263	1,217	3,263	[1]	(280)	$ 5,457	5,457	[1]
Less: Dividends on preferred stock		13	0		13		0
Net income (loss) attributable to Jackson Financial Inc. common shareholders, basic		1,204	3,263	[1]	(293)		5,457	[1]
Segment Reconciling Items
Guaranteed Benefits And Hedging Results [Abstract]
Fees attributed to guarantee benefit reserves		781	765		1,561		1,529
Net movement in freestanding derivatives		(1,911)	2,847		(4,423)		1,371
Market risk benefits gains (losses), net		2,570	(1,184)		2,744		723
Net reserve and embedded derivative movements		(194)	0		(383)		(40)
Amortization of DAC associated with non-operating items at date of transition to LDTI		(149)	(166)		(302)		(339)
Total guaranteed benefits and net hedging results		1,097	2,262		(803)		3,244
Net realized investment gains (losses)		(40)	5		(108)		(125)
Net realized investment gains (losses) on funds withheld assets		(134)	1,077		(807)		2,105
Net investment income on funds withheld assets		252	364		559		624
Other items		$ (18)	$ (64)		$ (41)		$ (67)

[1] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.

[2] (1) Recast for the adoption of ASU 2018-12. See Notes 1 and 2 to the Condensed Consolidated Financial Statements.