Segment - Operating Revenues Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) related to CIEs	$ 291,000,000	$ 301,000,000	$ 22,000,000
Total revenues	8,050,000,000	7,348,000,000	5,930,000,000
Other corporate	28,000,000	10,000,000	9,000,000
Income (loss) attributable to noncontrolling interests	75,000,000	104,000,000	(77,000,000)
Dividend payments made to preferred shareholders	41,000,000	36,000,000	36,000,000
Income (loss) before income taxes	799,000,000	678,000,000	428,000,000
Operating Segments and Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
External customer revenue	5,712,000,000	4,960,000,000	4,313,000,000
Net investment income and Net gains (losses)	2,047,000,000	2,087,000,000	1,595,000,000
Income (loss) related to CIEs	291,000,000	301,000,000	22,000,000
Adjustments	(563,000,000)	(526,000,000)	250,000,000
Adjusted operating revenues	7,487,000,000	6,822,000,000	6,183,000,000
Interest credited and other benefits to contract owners/policyholders	3,451,000,000	2,790,000,000	2,566,000,000
Administrative expenses	2,125,000,000	2,127,000,000	1,713,000,000
Premium taxes, fees and assessments	186,000,000	147,000,000	126,000,000
Net commissions	443,000,000	415,000,000	399,000,000
DAC/VOBA and other intangibles amortization	120,000,000	123,000,000	124,000,000
Financing costs and preferred dividends	162,000,000	161,000,000	177,000,000
Other corporate	66,000,000	96,000,000	142,000,000
Adjusted operating earnings before income taxes including Allianz noncontrolling interest	933,000,000	964,000,000	934,000,000
Less: Earnings (loss) attributable to Allianz noncontrolling interest	63,000,000	48,000,000	26,000,000
Adjusted operating earnings before income taxes	870,000,000	916,000,000	908,000,000
Net investment gains (losses)	50,000,000	(15,000,000)	(190,000,000)
Income (loss) related to businesses exited or to be exited through reinsurance or divestment	(142,000,000)	(182,000,000)	(138,000,000)
Income (loss) attributable to noncontrolling interests		104,000,000	(77,000,000)
Dividend payments made to preferred shareholders		36,000,000	36,000,000
Other adjustments	(95,000,000)	(180,000,000)	(111,000,000)
Operating Segments | Wealth Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
External customer revenue	1,332,000,000	1,121,000,000	1,100,000,000
Net investment income and Net gains (losses)	1,711,000,000	1,663,000,000	1,566,000,000
Income (loss) related to CIEs	0	0	0
Adjustments	(138,000,000)	(8,000,000)	111,000,000
Adjusted operating revenues	2,905,000,000	2,776,000,000	2,778,000,000
Interest credited and other benefits to contract owners/policyholders	849,000,000	895,000,000	886,000,000
Administrative expenses	897,000,000	931,000,000	867,000,000
Premium taxes, fees and assessments	0	0	0
Net commissions	255,000,000	229,000,000	232,000,000
DAC/VOBA and other intangibles amortization	84,000,000	90,000,000	95,000,000
Financing costs and preferred dividends	0	0	0
Other corporate	0	0	0
Adjusted operating earnings before income taxes including Allianz noncontrolling interest		632,000,000	697,000,000
Less: Earnings (loss) attributable to Allianz noncontrolling interest	0	0	0
Adjusted operating earnings before income taxes	820,000,000	632,000,000	697,000,000
Operating Segments | Health Solutions
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
External customer revenue	3,438,000,000	2,948,000,000	2,448,000,000
Net investment income and Net gains (losses)	138,000,000	130,000,000	135,000,000
Income (loss) related to CIEs	0	0	0
Adjustments	1,000,000	4,000,000	(1,000,000)
Adjusted operating revenues	3,577,000,000	3,082,000,000	2,582,000,000
Interest credited and other benefits to contract owners/policyholders	2,602,000,000	1,896,000,000	1,680,000,000
Administrative expenses	525,000,000	506,000,000	276,000,000
Premium taxes, fees and assessments	186,000,000	147,000,000	126,000,000
Net commissions	188,000,000	186,000,000	167,000,000
DAC/VOBA and other intangibles amortization	36,000,000	33,000,000	29,000,000
Financing costs and preferred dividends	0	0	0
Other corporate	0	0	0
Adjusted operating earnings before income taxes including Allianz noncontrolling interest		315,000,000	304,000,000
Less: Earnings (loss) attributable to Allianz noncontrolling interest	0	0	0
Adjusted operating earnings before income taxes	40,000,000	315,000,000	304,000,000
Operating Segments | Investment Management
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
External customer revenue	920,000,000	831,000,000	663,000,000
Net investment income and Net gains (losses)	20,000,000	26,000,000	14,000,000
Income (loss) related to CIEs	288,000,000	301,000,000	22,000,000
Intersegment Fee income and elimination	79,000,000	85,000,000	91,000,000
Adjustments	(325,000,000)	(327,000,000)	(35,000,000)
Adjusted operating revenues	982,000,000	916,000,000	756,000,000
Interest credited and other benefits to contract owners/policyholders	0	0	0
Administrative expenses	703,000,000	690,000,000	570,000,000
Premium taxes, fees and assessments	0	0	0
Net commissions	0	0	0
DAC/VOBA and other intangibles amortization	0	0	0
Financing costs and preferred dividends	0	0	0
Other corporate	0	0	0
Adjusted operating earnings before income taxes including Allianz noncontrolling interest	278,000,000	225,000,000	186,000,000
Less: Earnings (loss) attributable to Allianz noncontrolling interest	65,000,000	49,000,000	27,000,000
Adjusted operating earnings before income taxes	213,000,000	177,000,000	158,000,000
Corporate
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
External customer revenue	22,000,000	60,000,000	102,000,000
Net investment income and Net gains (losses)	178,000,000	268,000,000	(120,000,000)
Income (loss) related to CIEs	3,000,000	0	0
Intersegment Fee income and elimination	(79,000,000)	(85,000,000)	(91,000,000)
Adjustments	(101,000,000)	(195,000,000)	175,000,000
Adjusted operating revenues	23,000,000	48,000,000	67,000,000
Interest credited and other benefits to contract owners/policyholders	0	0	0
Administrative expenses	0	0	0
Premium taxes, fees and assessments	0	0	0
Net commissions	0	0	0
DAC/VOBA and other intangibles amortization	0	0	0
Financing costs and preferred dividends	162,000,000	161,000,000	177,000,000
Other corporate	66,000,000	96,000,000	142,000,000
Adjusted operating earnings before income taxes including Allianz noncontrolling interest	(205,000,000)	(208,000,000)	(253,000,000)
Less: Earnings (loss) attributable to Allianz noncontrolling interest	(2,000,000)	(1,000,000)	(1,000,000)
Adjusted operating earnings before income taxes	(203,000,000)	(207,000,000)	(251,000,000)
Excluding Corporate Nonsegment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Investment gains (losses) and other related adjustments	22,000,000	(44,000,000)	(215,000,000)
Revenues related to business exited through reinsurance or divestment	102,000,000	113,000,000	(123,000,000)
Revenues Attributable to Noncontrolling Interest	243,000,000	247,000,000	(33,000,000)
Other Operating Income	$ 196,000,000	$ 210,000,000	$ 121,000,000