Variable Annuity and Insurance Guarantees (VA Guarantees Details) (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Mar. 31, 2021	Dec. 31, 2020
GMDB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 84,325	$ 83,781
Contract value in separate accounts	[1]	79,279	78,705
Net amount at risk	[1]	$ 73	$ 64
Weighted average attained age	[1]	68 years	68 years
GMDB [Member] | Return of premium [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 67,317	$ 66,874
Contract value in separate accounts	[1]	65,396	64,932
Net amount at risk	[1]	$ 7	$ 5
Weighted average attained age	[1]	68 years	68 years
GMDB [Member] | Five/six-year reset [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 8,211	$ 8,116
Contract value in separate accounts	[1]	5,486	5,386
Net amount at risk	[1]	$ 7	$ 6
Weighted average attained age	[1]	68 years	68 years
GMDB [Member] | One-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 6,093	$ 6,094
Contract value in separate accounts	[1]	5,765	5,763
Net amount at risk	[1]	$ 13	$ 8
Weighted average attained age	[1]	71 years	71 years
GMDB [Member] | Five-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 1,437	$ 1,436
Contract value in separate accounts	[1]	1,383	$ 1,381
Net amount at risk	[1]	$ 1
Weighted average attained age	[1]	67 years	67 years
GMDB [Member] | Other [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 1,267	$ 1,261
Contract value in separate accounts	[1]	1,249	1,243
Net amount at risk	[1]	$ 45	$ 45
Weighted average attained age	[1]	74 years	73 years
GGU death benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 1,196	$ 1,183
Contract value in separate accounts	[1]	1,139	1,126
Net amount at risk	[1]	$ 168	$ 162
Weighted average attained age	[1]	72 years	71 years
GMIB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 187	$ 187
Contract value in separate accounts	[1]	174	173
Net amount at risk	[1]	$ 5	$ 6
Weighted average attained age	[1]	71 years	71 years
GMWB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 52,338	$ 52,114
Contract value in separate accounts	[1]	52,260	52,024
Net amount at risk	[1]	$ 210	$ 186
Weighted average attained age	[1]	69 years	69 years
GMWB [Member] | GMWB standard benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 1,949	$ 1,972
Contract value in separate accounts	[1]	1,944	1,967
Net amount at risk	[1]	$ 1	$ 1
Weighted average attained age	[1]	74 years	74 years
GMWB [Member] | GMWB for life [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 50,389	$ 50,142
Contract value in separate accounts	[1]	50,316	50,057
Net amount at risk	[1]	$ 209	$ 185
Weighted average attained age	[1]	69 years	69 years
GMAB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	[1]	$ 2,187	$ 2,291
Contract value in separate accounts	[1]	2,186	$ 2,291
Net amount at risk	[1]	$ 0
Weighted average attained age	[1]	61 years	61 years

[1] Individual variable annuity contracts may have more than one guarantee and therefore may be included in more than one benefit type. Variable annuity contracts for which the death benefit equals the account value are not shown in this table.