Schedule II - Aflac Incorporated - Aggregate Contractual Maturities of Notes Payable (Detail) $ in Millions	Dec. 31, 2024 USD ($)
Condensed Financial Statements, Captions [Line Items]
2025	$ 79
2026	700
2027	453
2028	0
2029	533
Thereafter	5,690
Total	7,455
Parent Company
Condensed Financial Statements, Captions [Line Items]
2025	79
2026	700
2027	453
2028	0
2029	533
Thereafter	5,500
Total	$ 7,265

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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