Supplementary Insurance Information (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		$ 3,690	$ 3,616
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		62,159	54,729
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		6,993	6,413
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		12,513	11,694	$ 11,297
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		3,138	2,575	2,520
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		13,476	11,779	10,894
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	532	383	330
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	1,959	1,881	1,944
US Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		1,926	1,816
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		12,757	12,245
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		2,806	2,578
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		6,244	5,838	5,729
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		930	714	769
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		6,790	5,979	5,339
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	269	200	199
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	679	679	697
US Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		190	255
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		25,107	23,104
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		24	18
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		55	53	39
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		1,089	999	931
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		731	764	737
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	101	52	31
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	145	109	113
Canada Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		192	195
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		3,668	3,474
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		330	292
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		1,194	1,052	1,066
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		248	207	205
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		1,096	909	857
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	13	16	12
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	211	201	249
Canada Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		16	16
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		5	4
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		90	83	89
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		0	1	3
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		79	68	80
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	7	3	4
EMEA Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		253	264
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		1,366	1,379
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		1,612	1,389
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		1,738	1,555	1,442
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		88	72	73
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		1,829	1,389	1,205
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	48	31	36
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	189	186	199
EMEA Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		5,999	5,881
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		89	66
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		350	252	218
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		205	193	195
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		258	163	175
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	55	50	52
Asia Pacific Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		1,052	1,045
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		3,792	3,568
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		2,116	2,059
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		2,624	2,681	2,568
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		136	107	104
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		2,445	2,293	2,317
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	60	65	36
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	283	274	223
Asia Pacific Non-Traditional Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		74	41
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		8,202	4,187
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		6	2
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		218	180	146
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		138	85	46
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		244	206	162
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	41	19	16
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	34	25	27
Corporate And Other Segment Reporting Information [Member]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Line Items]
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Deferred Policy Acquisition Cost		3	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense		1,252	875
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Policy Claim and Benefit Payable		5	5
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Premium Revenue		0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income		304	197	194
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Benefit, Claim, Loss and Settlement Expenses		4	8	22
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Amortization of Deferred Policy Acquisition Cost	[1]	0	0	0
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense	[2]	$ 356	$ 354	$ 380

[1] Includes the effect from investment related gains and losses.

[2] Includes policy acquisition costs and other insurance expenses, excluding amortization of DAC. Also includes other operating expenses, interest expense, and collateral finance and securitization expense.