SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Schedule of Impact from Adoption on Balance Sheet (Details) - USD ($) $ in Millions		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Investments and cash:
Available for sale, fixed maturity securities		$ 75,741		$ 98,696
Held to maturity, fixed maturity securities		19,056	[1]	22,000
Equity securities		1,091		1,603
Commercial mortgage and other loans		13,496		11,786
Other investments		4,070		3,842
Cash and cash equivalents		3,943		5,051
Total investments and cash		117,397		142,978
Receivables		647		672
Accrued investment income		745		737
Deferred policy acquisition costs		8,593		9,525
Property and equipment, at cost less accumulated depreciation		530		538
Other		3,105		3,092
Assets		131,017		157,542
Policy liabilities:
Future policy benefits		80,749		90,588
Unpaid policy claims		4,561		4,836
Unearned premiums		1,825		2,576
Other policyholders' funds		6,123		7,072
Total policy liabilities		93,258		105,072
Income taxes		1,296		4,339
Payables for return of cash collateral on loaned securities		1,809		2,162
Notes payable and lease obligations		7,442		7,956
Other Liabilities		4,847		4,760
Total liabilities		108,652		124,289
Commitments and contingent liabilities
Shareholders' equity:
Common stock		135		135
Additional paid-in capital		2,641		2,529
Retained earnings		44,568		41,381
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)		(3,640)		(2,013)
Unrealized gains (losses) on fixed maturity securities		(702)		9,602
Unrealized gains (losses) on derivatives		(27)		(30)
Pension liability adjustment		(36)		(166)
Treasury stock, at average cost		(20,574)		(18,185)
Stockholders' Equity Attributable to Parent		22,365		33,253		$ 33,559	$ 28,959
Total liabilities and shareholders' equity		131,017		157,542
Accounting Standards Update 2018-12 | Pro Forma
Investments and cash:
Held to maturity, fixed maturity securities		19,056		22,000
Equity securities		1,091		1,603
Commercial mortgage and other loans		13,496		11,786
Other investments		4,070		3,842
Cash and cash equivalents		3,943		5,051
Total investments and cash		117,397		142,978
Receivables		647		672
Accrued investment income		745		737
Deferred policy acquisition costs	[2]	9,239		9,848
Property and equipment, at cost less accumulated depreciation		530		538
Other	[3]	3,180		3,377
Assets		131,738		158,150
Policy liabilities:
Future policy benefits	[4],[5],[6]	88,241		115,964
Unpaid policy claims	[5],[7]	201		151
Unearned premiums		1,825		2,576
Other policyholders' funds	[7]	6,643		7,640
Total policy liabilities		96,910		126,331
Income taxes	[8]	698		30
Payables for return of cash collateral on loaned securities		1,809		2,162
Notes payable and lease obligations		7,442		7,956
Other Liabilities	[4]	4,739		4,640
Total liabilities		111,598		141,119
Commitments and contingent liabilities
Shareholders' equity:
Common stock		135		135
Additional paid-in capital		2,641		2,529
Retained earnings		44,367	[9]	40,963	[10]
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)	[11]	(3,564)		(1,985)
Unrealized gains (losses) on fixed maturity securities		(702)		9,602
Unrealized gains (losses) on derivatives		(27)		(30)
Effect of changes in discount rate assumptions		(2,100)	[12]	(15,832)	[13]
Pension liability adjustment		(36)		(166)
Treasury stock, at average cost		(20,574)		(18,185)
Stockholders' Equity Attributable to Parent		20,140		17,031
Total liabilities and shareholders' equity		131,738		158,150
Accounting Standards Update 2018-12 | As Reported | Pro Forma
Investments and cash:
Held to maturity, fixed maturity securities		19,056		22,000
Equity securities		1,091		1,603
Commercial mortgage and other loans		13,496		11,786
Other investments		4,070		3,842
Cash and cash equivalents		3,943		5,051
Total investments and cash		117,397		142,978
Receivables		647		672
Accrued investment income		745		737
Deferred policy acquisition costs	[2]	8,593		9,525
Property and equipment, at cost less accumulated depreciation		530		538
Other	[3]	3,105		3,092
Assets		131,017		157,542
Policy liabilities:
Future policy benefits	[4],[5],[6]	80,749		90,588
Unpaid policy claims	[5],[7]	4,561		4,836
Unearned premiums		1,825		2,576
Other policyholders' funds	[7]	6,123		7,072
Total policy liabilities		93,258		105,072
Income taxes	[8]	1,296		4,339
Payables for return of cash collateral on loaned securities		1,809		2,162
Notes payable and lease obligations		7,442		7,956
Other Liabilities	[4]	4,847		4,760
Total liabilities		108,652		124,289
Commitments and contingent liabilities
Shareholders' equity:
Common stock		135		135
Additional paid-in capital		2,641		2,529
Retained earnings		44,568	[9]	41,381	[10]
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)	[11]	(3,640)		(2,013)
Unrealized gains (losses) on fixed maturity securities		(702)		9,602
Unrealized gains (losses) on derivatives		(27)		(30)
Effect of changes in discount rate assumptions		0	[12]	0	[13]
Pension liability adjustment		(36)		(166)
Treasury stock, at average cost		(20,574)		(18,185)
Stockholders' Equity Attributable to Parent		22,365		33,253
Total liabilities and shareholders' equity		131,017		157,542
Accounting Standards Update 2018-12 | Adoption Impacts | Pro Forma
Investments and cash:
Held to maturity, fixed maturity securities		0		0
Equity securities		0		0
Commercial mortgage and other loans		0		0
Other investments		0		0
Cash and cash equivalents		0		0
Total investments and cash		0		0
Receivables		0		0
Accrued investment income		0		0
Deferred policy acquisition costs	[2]	646		323
Property and equipment, at cost less accumulated depreciation		0		0
Other	[3]	75		285
Assets		721		608
Policy liabilities:
Future policy benefits	[4],[5],[6]	7,492		25,376
Unpaid policy claims	[5],[7]	(4,360)		(4,685)
Unearned premiums		0		0
Other policyholders' funds	[7]	520		568
Total policy liabilities		3,652		21,259
Income taxes	[8]	(598)		(4,309)
Payables for return of cash collateral on loaned securities		0		0
Notes payable and lease obligations		0		0
Other Liabilities	[4]	(108)		(120)
Total liabilities		2,946		16,830
Commitments and contingent liabilities
Shareholders' equity:
Common stock		0		0
Additional paid-in capital		0		0
Retained earnings		(201)	[9]	(418)	[10]
Accumulated other comprehensive income (loss):
Unrealized foreign currency translation gains (losses)	[11]	76		28
Unrealized gains (losses) on fixed maturity securities		0		0
Unrealized gains (losses) on derivatives		0		0
Effect of changes in discount rate assumptions		(2,100)	[12]	(15,832)	[13]
Pension liability adjustment		0		0
Treasury stock, at average cost		0		0
Stockholders' Equity Attributable to Parent		(2,225)		(16,222)
Total liabilities and shareholders' equity		721		608
Consolidated Entity, Excluding VIE | Accounting Standards Update 2018-12 | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		71,936		94,206
Consolidated Entity, Excluding VIE | Accounting Standards Update 2018-12 | As Reported | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		71,936		94,206
Consolidated Entity, Excluding VIE | Accounting Standards Update 2018-12 | Adoption Impacts | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		0		0
Variable Interest Entity, Consolidated
Investments and cash:
Available for sale, fixed maturity securities		3,805		4,490
Commercial mortgage and other loans	[14]	10,832		9,740
Other investments	[14],[15]	1,909		1,535
Policy liabilities:
Total liabilities	[14]	390		414
Variable Interest Entity, Consolidated | Accounting Standards Update 2018-12 | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		3,805		4,490
Variable Interest Entity, Consolidated | Accounting Standards Update 2018-12 | As Reported | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		3,805		4,490
Variable Interest Entity, Consolidated | Accounting Standards Update 2018-12 | Adoption Impacts | Pro Forma
Investments and cash:
Available for sale, fixed maturity securities		$ 0		$ 0

[1] Net of allowance for credit losses

[2] Adjustment reflects an increase in DAC assets as a result of DAC being amortized over the expected life of a contract and no interest accretion recorded under the updated standard.

[3] Adjustment reflects the discounting of reinsurance recoverables under the updated standard.

[4] Adjustment for the reclassification of accrued claim adjustment expenses from other liabilities to future policy benefits as a component of the integrated reserve.

[5] Adjustment for the reclassification of unpaid policy claims for long-duration contracts to future policy benefits as a component of the integrated reserve.

[6] Adjustment reflects the impacts of adopting the standard and post-adoption impacts including calculating benefit reserves using revised net premium ratios and an increase in the deferred profit liability on limited-payment products

[7] Adjustment for the reclassification of the claims liability for certain fixed annuity benefits from unpaid policy claims to other policyholders' funds.

[8] Adjustment reflects the tax effects from adoption and post-adoption activity under the updated standard.

[9] Adjustment reflects the cumulative impact from adoption and post-adoption activity under the updated standard, including the increase in 2022 net earnings of $217.

[10] Adjustment reflects the impacts from adoption of ($324) as a result of capping the net premium ratio at 100% for cohorts that are in a loss position at transition and post-adoption activity under the updated standard, including the decrease in 2021 net earnings of $(94).

[11] Adjustment reflects foreign currency translation related to the updated standard, as applicable.

[12] Adjustment reflects the cumulative impact from adoption and post-adoption activity under the updated standard, including an increase of $13,732 in 2022 due to changes in the discount rate assumptions.

[13] Adjustment reflects the impacts from adoption of ($18,570) and post-adoption activity under the updated standard, including $2,738 in 2021 due to changes in the discount rate assumptions

[14] Net of allowance for credit losses

[15] Consists entirely of alternative investments in limited partnerships