Basis of Presentation and Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2021	Dec. 31, 2022	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 489	$ 550	$ 489	$ 550	$ 646	$ 502	$ 723	$ 638
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					(33)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					(44)
Net Reinsurance Recoverables	6,912		6,912		6,524	6,964	6,013
Deferred income taxes, net	1,342		1,342		281	1,437	64
Retained earnings	17,865		17,865		15,770	17,058	13,918
Accumulated other comprehensive income (loss) ("AOCI"), net of tax	(3,524)		(3,524)		128	(3,841)	1,105
Stockholders' Equity Attributable to Parent	14,152	14,245	14,152	14,245	17,805	13,676	18,491
Policyholder Benefits and Claims Incurred, Net	3,580	3,074	7,062	6,194
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	672	554	1,325	1,095
Income tax expense	125	110	243	208
Net income	547	444	1,082	887
Net income available to common stockholders	$ 542	$ 439	$ 1,072	$ 877
Net income available to common stockholders	$ 1.75	$ 1.34	$ 3.44	$ 2.66
Net income available to common stockholders	$ 1.73	$ 1.32	$ 3.39	$ 2.62
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 277	$ (1,095)	$ 1,399	$ (2,490)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent	(269)	(1,597)	317	(3,489)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(270)	(1,539)	317	(3,377)
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense	5	29	(3)	72
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					596	561	638
Net Reinsurance Recoverables					6,523	6,966	6,011
Deferred income taxes, net					270	1,449	46
Retained earnings					15,764	17,048	13,918
Accumulated other comprehensive income (loss) ("AOCI"), net of tax					172	(3,876)	1,170
Stockholders' Equity Attributable to Parent					17,843	13,631	18,556
Policyholder Benefits and Claims Incurred, Net		3,076		6,194
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		552		1,095
Income tax expense		110		208
Net income		442		887
Net income available to common stockholders		$ 437		$ 877
Net income available to common stockholders		$ 1.33		$ 2.66
Net income available to common stockholders		$ 1.32		$ 2.62
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		$ (1,121)		$ (2,547)
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		(1,592)		(3,474)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		(1,563)		(3,434)
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense		0		0
Accounting Standards Update 2018-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					50	(59)	85
Net Reinsurance Recoverables					1	(2)	2
Deferred income taxes, net					11	(12)	18
Retained earnings					6	10	0
Accumulated other comprehensive income (loss) ("AOCI"), net of tax					(44)	35	(65)
Stockholders' Equity Attributable to Parent					(38)	$ 45	(65)
Policyholder Benefits and Claims Incurred, Net		(2)		0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		2		0
Income tax expense		0		0
Net income		2		0
Net income available to common stockholders		$ 2		$ 0
Net income available to common stockholders		$ 0.01		$ 0
Net income available to common stockholders		$ 0		$ 0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		$ 26		$ 57
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent		(5)		(15)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent		24		57
Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense		29		72
Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							85
Net Reinsurance Recoverables							2
Deferred income taxes, net							18
Accumulated other comprehensive income (loss) ("AOCI"), net of tax							(65)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							(26)
Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							111
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					646		723
Fixed Annuity
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	139	152	139	152				189
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					(11)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					(7)
Fixed Annuity | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							17
Fixed Annuity | Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							(26)
Fixed Annuity | Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							(16)
Fixed Annuity | Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							59
Fixed Annuity | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					188		206
Life Conversions
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	65	73	65	73				94
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					(7)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					(14)
Life Conversions | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							21
Life Conversions | Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Life Conversions | Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Life Conversions | Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							21
Life Conversions | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					94		115
Paid Up Life
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	186	212	186	212				267
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					(15)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					(17)
Paid Up Life | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							27
Paid Up Life | Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Paid Up Life | Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							(2)
Paid Up Life | Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							29
Paid Up Life | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					262		294
Deferred Profit Liability
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	19	20	19	20				0
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					2
Deferred Profit Liability | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							18
Deferred Profit Liability | Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Deferred Profit Liability | Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							18
Deferred Profit Liability | Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Deferred Profit Liability | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					20		18
Long-Duration Insurance, Other
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance	$ 80	$ 93	$ 80	$ 93				$ 88
OCI, Liability for Future Policy Benefit, Gain (Loss), before Reclassification Adjustment and Tax					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change					(8)
Long-Duration Insurance, Other | Cumulative Effect, Period of Adoption, Adjustment [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							2
Long-Duration Insurance, Other | Cumulative Effect, Period of Adoption, Adjustment [Member] | Removal of shadow reserve
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Long-Duration Insurance, Other | Cumulative Effect, Period of Adoption, Adjustment [Member] | Update cash flow assumptions and establish DPL
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							0
Long-Duration Insurance, Other | Cumulative Effect, Period of Adoption, Adjustment [Member] | Effect of measurement at current single-A rate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance							2
Long-Duration Insurance, Other | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, before Reinsurance					$ 82		$ 90