Segment Information (Tables)	12 Months Ended
	Dec. 31, 2021
Segment Information [Abstract]
Reconciliation Of Revenue From Segments To Consolidated	For the Years Ended December 31, 2021 2020 2019 Revenues Operating revenues: Annuities$ 5,002 $ 4,455 $ 4,600 Retirement Plan Services 1,324 1,213 1,200 Life Insurance 8,137 7,516 7,438 Group Protection 4,996 4,793 4,588 Other Operations 180 185 220 Excluded realized gain (loss), pre-tax (411) (721) (794)Amortization of DFEL associated with benefit ratio unlocking, pre-tax 2 (2) 6 Total revenues$ 19,230 $ 17,439 $ 17,258
Reconciliation Of Income (Loss) From Operations By Segment To Consolidated Net Income (Loss)	For the Years Ended December 31, 2021 2020 2019 Net Income (Loss) Income (loss) from operations: Annuities$ 1,283 $ 983 $ 954 Retirement Plan Services 235 168 172 Life Insurance 535 (34) 259 Group Protection (127) 43 238 Other Operations (375) (295) (268)Excluded realized gain (loss), after-tax (325) (570) (627)Benefit ratio unlocking, after-tax 196 194 277 Net impact from the Tax Cuts and Jobs Act - 37 17 Transaction and integration costs related to mergers, acquisitions and divestitures, after-tax (11) (15) (103)Gain (loss) on modification or early extinguishment of debt, after-tax (6) (12) (33)Net income (loss)$ 1,405 $ 499 $ 886
Reconciliation of Net Investment Income From Segments to Consolidated	For the Years Ended December 31, 2021 2020 2019 Net Investment Income Annuities$ 1,401 $ 1,272 $ 1,140 Retirement Plan Services 992 933 924 Life Insurance 3,209 2,823 2,658 Group Protection 366 330 307 Other Operations 147 152 194 Total net investment income$ 6,115 $ 5,510 $ 5,223
Reconciliation of DAC VOBA Amortization From Segments to Consolidated	For the Years Ended December 31, 2021 2020 2019 Amortization of DAC and VOBA, Net of Interest Annuities$ 442 $ 387 $ 408 Retirement Plan Services 32 29 26 Life Insurance 1,030 785 779 Group Protection 107 114 111 Total amortization of DAC and VOBA, net of interest$ 1,611 $ 1,315 $ 1,324
Reconciliation of Federal Income Tax Expense (Benefit) from Segments to Consolidated Net Income (Loss)	For the Years Ended December 31, 2021 2020 2019 Federal Income Tax Expense (Benefit) Annuities$ 241 $ 149 $ 139 Retirement Plan Services 49 24 23 Life Insurance 122 (33) 47 Group Protection (33) 11 63 Other Operations (106) (82) (92)Excluded realized gain (loss) (86) (151) (167)Gain (loss) on early extinguishment of debt (2) (3) (9)Benefit ratio unlocking 52 51 74 Net impact from the Tax Cuts and Jobs Act - (37) (17)Transaction and integration costs related to mergers, acquisitions and divestitures (4) (5) (28)Total federal income tax expense (benefit)$ 233 $ (76)$ 33
Reconciliation Of Assets From Segments To Consolidated	As of December 31, 2021 2020 Assets Annuities$ 201,732 $ 184,678 Retirement Plan Services 47,625 45,372 Life Insurance 105,208 101,941 Group Protection 10,522 10,201 Other Operations 22,214 23,756 Total assets$ 387,301 $ 365,948