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Adoption of Accounting Pronouncement - Other Comprehensive Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2022
Sep. 30, 2022
Dec. 31, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Net income (loss) $ 495 $ (2,794) $ (1,896) $ 1,718 $ (4,690) $ (4,690) $ (5,742) $ (5,016)
Other comprehensive income (loss), before tax                
Unrealized investment gains (losses) on available-for-sale securities (711) (7,553) (6,697) 1,388 (14,250)   (20,178) (18,156)
Remeasurement gains (losses) on future policy benefits related to discount rate 813 2,897 3,562 11 6,459   8,833 8,425
Remeasurement gains (losses) on market risk benefits related to credit risk (55) 179 397 34 576   524 366
Foreign currency translation and other adjustments 11 (79) (2) 27 (81)   (72) (27)
Other comprehensive income (loss), before tax (113) (4,475) (2,869) 1,393 (7,344)   (11,021) (9,390)
Income tax expense (benefit) related to other comprehensive income (loss) 11 (878) (615) 301 (1,493) (1,493) (2,220) (1,933)
Other comprehensive income (loss) (124) (3,597) (2,254) 1,092 (5,851) $ (5,851) (8,801) (7,457)
Comprehensive income (loss) 371 (6,391) (4,150) 2,810 (10,541)   (14,543) (12,473)
Less: Comprehensive income (loss) attributable to noncontrolling interests 158 (1,306) (817) 656 (2,123)   (2,763) (2,242)
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders $ 213 $ (5,085) (3,333) $ 2,154 (8,418)   (11,780) (10,231)
Adoption                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Net income (loss)     470   868   1,193 1,238
Other comprehensive income (loss), before tax                
Unrealized investment gains (losses) on available-for-sale securities     (267)   (547)   (764) (699)
Remeasurement gains (losses) on future policy benefits related to discount rate     3,562   6,459   8,833 8,425
Remeasurement gains (losses) on market risk benefits related to credit risk     397   576   524 366
Foreign currency translation and other adjustments     (6)   (27)   (59) (11)
Other comprehensive income (loss), before tax     3,686   6,461   8,534 8,081
Income tax expense (benefit) related to other comprehensive income (loss)     555   960   1,224 1,150
Other comprehensive income (loss)     3,131   5,501   7,310 6,931
Comprehensive income (loss)     3,601   6,369   8,503 8,169
Less: Comprehensive income (loss) attributable to noncontrolling interests     777   1,397   2,024 1,927
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders     2,824   4,972   6,479 6,242
Reported                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Net income (loss)     (2,366)   (5,558)   (6,935) (6,254)
Other comprehensive income (loss), before tax                
Unrealized investment gains (losses) on available-for-sale securities     (6,430)   (13,703)   (19,414) (17,457)
Remeasurement gains (losses) on future policy benefits related to discount rate     0   0   0 0
Remeasurement gains (losses) on market risk benefits related to credit risk     0   0   0 0
Foreign currency translation and other adjustments     4   (54)   (13) (16)
Other comprehensive income (loss), before tax     (6,555)   (13,805)   (19,555) (17,471)
Income tax expense (benefit) related to other comprehensive income (loss)     (1,170)   (2,453)   (3,444) (3,083)
Other comprehensive income (loss)     (5,385)   (11,352)   (16,111) (14,388)
Comprehensive income (loss)     (7,751)   (16,910)   (23,046) (20,642)
Less: Comprehensive income (loss) attributable to noncontrolling interests     (1,594)   (3,520)   (4,787) (4,169)
Comprehensive income (loss) attributable to Athene Holding Ltd. shareholders     $ (6,157)   $ (13,390)   $ (18,259) $ (16,473)