Impact of New Accounting Standard (Policyholder Benefits) (Details) - USD ($) $ in Millions		3 Months Ended		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021		Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Future policy benefits				$ 41,231	$ 35,689
Policyholder Account Balance				23,490	24,010
Interest credited				864	682	$ 700
Accounting Standards Update 2018-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Future policy benefits					35,689	47,449
Interest credited		$ 682	$ 700
Life Insurance Product Line [Member] | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				76,943	74,207	73,447
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					905	(805)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					88	(4)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					75,200	72,638
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			4,174	3,329
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			3,526	3,423
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(5,928)	(5,182)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			(35)	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				6	(1)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				72,370	67,904
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				89,036	85,285	84,075
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					922	(675)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					170	85
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					86,377	83,485
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			4,174	3,333
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			4,075	3,940
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(5,545)	(5,472)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			(54)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				9	(1)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				83,317	77,378
Future policy benefits				10,947	9,474
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				(767)	(421)
Liability for Future Policy Benefit, after Reinsurance				10,180	9,053
Policyholder Account Balance				1,612	1,683	1,719
Policyholder Account Balance, Issuance				21	24
Policyholder Account Balance, Policy Charge				(31)	(32)
Policyholder Account Balance, Surrender and Withdrawal				(15)	(17)
Policyholder Account Balance, Benefit Payment				(113)	(76)
Interest credited				67	65
Policyholder Account Balance Foreign Currency Translation				0	0
Policyholder Account Balance Reinsurance Recoverable				0	0
Policyholder Account Balance After Reinsurance				1,612	1,683
Life Insurance Product Line [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						73,447			$ 70,317
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									984
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									254
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									71,555
Liability for Future Policy Benefit, Expected Net Premium, Issuance						3,522	[6]
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					3,400
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(5,025)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						(5)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						15,771
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						89,218
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						84,075			81,172
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									1,021
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									517
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									82,710
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					3,537
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					3,916
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(6,083)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						(5)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						19,185
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						103,260
Future policy benefits						14,042		$ 17,632
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						(697)		(1,123)
Liability for Future Policy Benefit, after Reinsurance						13,345		16,509
Policyholder Account Balance						1,719			1,752
Policyholder Account Balance, Issuance			25
Policyholder Account Balance, Policy Charge			(32)
Policyholder Account Balance, Surrender and Withdrawal			(13)
Policyholder Account Balance, Benefit Payment			(79)
Interest credited			66
Policyholder Account Balance Foreign Currency Translation			0
Policyholder Account Balance Reinsurance Recoverable						0
Policyholder Account Balance After Reinsurance						1,719
Life Insurance Product Line [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									70,319
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									80,275
Life Insurance Product Line [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									20,758
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									26,196
Life Insurance Product Line [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									91,077
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									106,471
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				22,689	21,330	21,989
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					96	189
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					401	212
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					21,827	22,390
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			546	635
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			753	748
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(941)	(950)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				504	(1,493)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				18,509	16,431
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				26,275	24,655	25,440
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					108	191
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					410	212
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					25,173	25,843
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			546	635
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			965	958
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(995)	(1,051)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				586	(1,730)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				22,966	20,382
Future policy benefits				4,457	3,951
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				(298)	(265)
Liability for Future Policy Benefit, after Reinsurance				4,159	3,686
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						21,989			21,299
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									(45)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									(24)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									21,230
Liability for Future Policy Benefit, Expected Net Premium, Issuance						761	[6]
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					775
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(947)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						170
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						(199)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						21,790
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						25,440			24,587
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									(45)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									(24)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									24,518
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					761
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					992
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(1,025)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						194
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						1,905
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						27,345
Future policy benefits						5,555		6,364
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						(367)		(386)
Liability for Future Policy Benefit, after Reinsurance						5,188		5,978
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									21,332
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									24,587
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									1,785
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									4,469
Life Insurance Product Line [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									23,117
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									29,056
Life Insurance Product Line [Member] | EMEA [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				15,328	14,244	14,440
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					199	123
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					254	835
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					14,697	15,398
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			1,074	1,083
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			509	500
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(1,492)	(1,324)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				540	(1,413)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				13,042	11,605
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				16,756	15,454	15,664
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					246	136
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					267	813
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					15,967	16,613
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			1,076	1,083
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			549	530
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(1,427)	(1,260)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				591	(1,512)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				14,251	12,646
Future policy benefits				1,209	1,041
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				(34)	(31)
Liability for Future Policy Benefit, after Reinsurance				1,175	1,010
Life Insurance Product Line [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						14,440			13,999
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									48
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									379
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									14,426
Liability for Future Policy Benefit, Expected Net Premium, Issuance						2,417	[6]
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					553
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(1,488)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					(1,167)
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						(301)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						1,280
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						15,720
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						15,664			15,281
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									42
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									422
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									15,745
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					2,436
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					598
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(1,609)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					(1,176)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						(330)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						1,445
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						17,109
Future policy benefits						1,389		2,670
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						(34)		(85)
Liability for Future Policy Benefit, after Reinsurance						1,355		2,585
Life Insurance Product Line [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									14,033
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									15,246
Life Insurance Product Line [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									2,599
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									2,989
Life Insurance Product Line [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									16,632
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									18,235
Life Insurance Product Line [Member] | Asia Pacific [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				42,741	40,506	37,943
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					(180)	1,604
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					234	197
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					40,560	39,744
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			3,469	3,663
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			1,072	1,032
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(2,042)	(1,989)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				(318)	(1,944)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				30,742	29,579
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				47,370	44,785	41,971
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					(171)	1,681
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					189	234
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					44,803	43,886
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			3,470	3,667
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			1,225	1,171
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(1,846)	(1,832)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				(282)	(2,107)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				33,406	31,927
Future policy benefits				2,664	2,348
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				(122)	(100)
Liability for Future Policy Benefit, after Reinsurance				2,542	2,248
Life Insurance Product Line [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						37,943			34,133
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									600
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									402
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									35,135
Liability for Future Policy Benefit, Expected Net Premium, Issuance						4,575	[6]
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					970
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(2,038)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						(699)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						(5,458)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						32,485
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						41,971			37,765
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									699
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									559
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									39,023
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					4,585
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					1,107
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(1,971)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						(773)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						(6,475)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						35,496
Future policy benefits						3,011		4,419
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						(116)		(212)
Liability for Future Policy Benefit, after Reinsurance						2,895		4,207
Life Insurance Product Line [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									34,167
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									37,335
Life Insurance Product Line [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									(3,385)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									(3,694)
Life Insurance Product Line [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									30,782
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									33,641
Insurance, Other [Member] | Americas [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				1,455	1,671	228
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					(69)	(31)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(21)	(22)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					1,581	175
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			1,423	1,580
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			49	41
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(1,598)	(125)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				0	0
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				1,246	1,387
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				6,843	5,823	4,628
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					(91)	(34)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(29)	(46)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					5,703	4,548
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			1,467	1,580
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			239	220
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(550)	(525)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			(16)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				6,474	5,206
Future policy benefits				5,228	3,819
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				(913)	0
Liability for Future Policy Benefit, after Reinsurance				4,315	3,819
Policyholder Account Balance				17,838	18,906	18,758
Policyholder Account Balance, Issuance				919	1,289
Policyholder Account Balance, Policy Charge				(45)	(33)
Policyholder Account Balance, Surrender and Withdrawal				(2,045)	(1,258)
Policyholder Account Balance, Benefit Payment				(471)	(448)
Interest credited				574	598
Policyholder Account Balance Foreign Currency Translation				0	0
Policyholder Account Balance Reinsurance Recoverable				(3,065)	(1,543)
Policyholder Account Balance After Reinsurance				14,773	17,363
Insurance, Other [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						228			314
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									(33)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									(29)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									252
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[6]					0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					3
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(27)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						0
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						28
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						256
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						4,628			4,951
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									(33)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									(37)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									4,881
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					193
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(446)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						0
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						575
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						5,203
Future policy benefits						4,947		5,883
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						0		0
Liability for Future Policy Benefit, after Reinsurance						4,947		5,883
Policyholder Account Balance						18,758			16,273
Policyholder Account Balance, Issuance			3,290
Policyholder Account Balance, Policy Charge			(31)
Policyholder Account Balance, Surrender and Withdrawal			(1,015)
Policyholder Account Balance, Benefit Payment			(404)
Interest credited			645
Policyholder Account Balance Foreign Currency Translation			0
Policyholder Account Balance Reinsurance Recoverable						(1,561)
Policyholder Account Balance After Reinsurance						17,197
Insurance, Other [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									285
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									4,951
Insurance, Other [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									102
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									931
Insurance, Other [Member] | Americas [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									387
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									5,882
Insurance, Other [Member] | Canada Segment Reporting Information [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				3,184	3,394	3,329
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					(54)	0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(5)	(12)
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					3,335	3,317
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			0	574
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			105	112
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(329)	(354)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				73	(255)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				2,888	2,961
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				3,210	3,447	3,393
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					(76)	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(13)	(24)
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					3,358	3,369
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			0	574
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			107	115
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(328)	(351)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				73	(260)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				2,917	3,015
Future policy benefits				29	54
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				0	0
Liability for Future Policy Benefit, after Reinsurance				29	54
Insurance, Other [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						3,329			3,556
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									(30)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									17
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									3,543
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[6]					0
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					109
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(349)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						26
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						97
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						3,426
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						3,393			3,592
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									6
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									6
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									3,604
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					112
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(350)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						27
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						114
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						3,507
Future policy benefits						81		49
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						0		0
Liability for Future Policy Benefit, after Reinsurance						81		49
Insurance, Other [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									3,568
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									3,584
Insurance, Other [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									343
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									372
Insurance, Other [Member] | Canada Segment Reporting Information [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									3,911
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									3,956
Insurance, Other [Member] | EMEA [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				54,832	38,782	31,973
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					(561)	(126)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					5,046	573
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					43,267	32,420
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			12,489	12,594
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			1,028	698
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(3,991)	(3,169)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				2,039	(3,761)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				48,266	29,977
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				60,938	44,330	38,196
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					(595)	(140)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					4,991	566
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					48,726	38,622
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			12,489	12,594
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			1,206	856
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(3,803)	(3,355)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				2,320	(4,387)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				53,719	34,611
Future policy benefits				5,453	4,634
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				0	0
Liability for Future Policy Benefit, after Reinsurance				5,453	4,634
Insurance, Other [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						31,973			27,799
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									(76)
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									997
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									28,720
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[6]					8,357
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					714
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(3,590)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					(1,669)
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						(559)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						668
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						32,641
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						38,196			33,410
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									(76)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									1,000
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									34,334
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					8,357
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					890
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(3,064)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					(1,682)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						(639)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						1,174
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						39,370
Future policy benefits						6,729		6,991
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						0		0
Liability for Future Policy Benefit, after Reinsurance						6,729		6,991
Insurance, Other [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									28,055
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									33,410
Insurance, Other [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									3,634
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									4,901
Insurance, Other [Member] | EMEA [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									31,689
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									38,311
Insurance, Other [Member] | Asia Pacific [Member] | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance				2,057	1,605	1,051
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change					0	3
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(15)	29
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change					1,590	1,083
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[1]			2,160	1,465
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[2]			26	24
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[3]			(1,601)	(764)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change				(118)	(203)
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change				1,900	1,630
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance				8,019	6,561	6,062
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change					0	3
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience					(17)	36
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change					6,544	6,101
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[1]			2,170	1,465
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[2]			89	70
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[5]			(271)	(227)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[4]			0	0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change				(513)	(848)
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change				7,090	6,126
Future policy benefits				5,190	4,496
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance				0	0
Liability for Future Policy Benefit, after Reinsurance				5,190	4,496
Policyholder Account Balance				3,990	3,351	1,621
Policyholder Account Balance, Issuance				889	2,521
Policyholder Account Balance, Policy Charge				(10)	(134)
Policyholder Account Balance, Surrender and Withdrawal				(137)	(639)
Policyholder Account Balance, Benefit Payment				(208)	(46)
Interest credited				106	51
Policyholder Account Balance Foreign Currency Translation				(1)	(23)
Policyholder Account Balance Reinsurance Recoverable				0	0
Policyholder Account Balance After Reinsurance				$ 3,990	$ 3,351
Insurance, Other [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Cash Flow and Reinsurance						1,051			781
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) from Cash Flow Change									0
Liability for Future Policy Benefit, Expected Net Premium, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									777
Liability for Future Policy Benefit, Expected Net Premium, Original Discount Rate, before Reinsurance, after Cash Flow Change									1,558
Liability for Future Policy Benefit, Expected Net Premium, Issuance	[6]					3,156
Liability for Future Policy Benefit, Expected Net Premium, Interest Income	[7]					28
Liability for Future Policy Benefit, Expected Net Premium, Net Premium Collected	[8]					(3,621)
Liability for Future Policy Benefit, Expected Net Premium, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Net Premium, Increase (Decrease) for Other Change						(70)
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax						247
Liability for Future Policy Benefit, Expected Net Premium, before Reinsurance, after Discount Rate Change						1,298
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance						6,062			2,653
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change									0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) of Actual Variance from Expected Experience									777
Liability for Future Policy Benefit, Expected Future Benefit, Original Discount Rate, before Reinsurance, after Cash Flow Change									3,430
Liability for Future Policy Benefit, Expected Future Policy Benefit, Issuance	[6]					3,156
Liability for Future Policy Benefit, Expected Future Policy Benefit, Interest Expense	[7]					63
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment	[10]					(162)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Derecognition	[9]					0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Increase (Decrease) for Other Change						(425)
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax						250
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						6,312
Future policy benefits						5,014		1,887
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						0		0
Liability for Future Policy Benefit, after Reinsurance						5,014		$ 1,887
Policyholder Account Balance						1,621			809
Policyholder Account Balance, Issuance			868
Policyholder Account Balance, Policy Charge			(1)
Policyholder Account Balance, Surrender and Withdrawal			(36)
Policyholder Account Balance, Benefit Payment			(24)
Interest credited			19
Policyholder Account Balance Foreign Currency Translation			$ (14)
Policyholder Account Balance Reinsurance Recoverable						0
Policyholder Account Balance After Reinsurance						$ 1,621
Insurance, Other [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Original Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									781
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									2,645
Insurance, Other [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									114
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									125
Insurance, Other [Member] | Asia Pacific [Member] | Accounting Standards Update 2018-12 | Other Segments | Cumulative Effect, Period of Adoption, Adjusted Balance
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
AOCI, Liability for Future Policy Benefit, Expected Net Premium, before Tax									895
AOCI, Liability for Future Policy Benefit, Expected Future Policy Benefit, before Tax									$ 2,770

[1] Issuances: The present value, using the original discount rate, of the expected net premiums or the expected future policy benefits related to new reinsurance contracts that became effective during the current period and new policies assumed on existing contracts.

[2] Interest accrual: The interest earned on the beginning present value of either the expected net premiums or the expected future policy benefits using the original interest rate.

[3] Net premiums collected: The portion of gross premiums collected from the ceding company that is used to fund expected benefit payments.

[4] Derecognition: Includes the effects of treaty recaptures and treaty amendments that resulted in the termination of an existing treaty and the issuance of a new treaty under the internal replacement model.

[5] Benefit payments: The release of the present value, using the original discount rate, of the expected future policy benefits due to death, lapse/withdrawal, and other benefit payments based on current assumptions.

[6] Issuances: The present value, using the original discount rate, of the expected net premiums or the expected future policy benefits related to new reinsurance contracts that became effective during the current period and new policies assumed on existing contracts.

[7] Interest accrual: The interest earned on the beginning present value of either the expected net premiums or the expected future policy benefits using the original interest rate.

[8] Net premiums collected: The portion of gross premiums collected from the ceding company that is used to fund expected benefit payments.

[9] Derecognition: Includes the effects of treaty recaptures and treaty amendments that resulted in the termination of an existing treaty and the issuance of a new treaty under the internal replacement model.

[10] Benefit payments: The release of the present value, using the original discount rate, of the expected future policy benefits due to death, lapse/withdrawal, and other benefit payments based on the revised assumptions.