Derivative Financial Instruments - Net Realized Gains (Losses) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 7,000,000	$ 194,000,000	$ 17,000,000
Net investment income	1,523,000,000	1,619,000,000	1,949,000,000
Realized capital gains (losses)	(134,000,000)	(429,000,000)	166,000,000
Fixed maturities
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1,000,000)	(5,000,000)	(4,000,000)
Realized capital gains (losses)	(1,000,000)	(5,000,000)	(4,000,000)
Managed custody guarantees(3)
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(2,000,000)	(5,000,000)	4,000,000
Stabilizer
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1,000,000)	19,000,000	30,000,000
Realized capital gains (losses)	(1,000,000)	19,000,000	30,000,000
Not Designated as Hedging Instrument \| Credit Default Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	2,000,000	(3,000,000)	2,000,000
Not Designated as Hedging Instrument \| Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	10,000,000	184,000,000	(16,000,000)
Not Designated as Hedging Instrument \| Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1,000,000)	4,000,000	1,000,000
Other Comprehensive Income (Loss) \| Designated as Hedging Instrument \| Cash flow hedges \| Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	(2,000,000)	(1,000,000)
Other Comprehensive Income (Loss) \| Designated as Hedging Instrument \| Cash flow hedges \| Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(36,000,000)	58,000,000	33,000,000
Investment Income \| Designated as Hedging Instrument \| Cash flow hedges \| Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0
Investment Income \| Designated as Hedging Instrument \| Cash flow hedges \| Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	8,000,000	9,000,000	3,000,000
Net realized gains (losses) on derivatives	8,000,000	9,000,000	8,000,000
Net gains (losses) \| Designated as Hedging Instrument \| Cash flow hedges \| Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Net realized gains (losses) on derivatives	$ 0	$ 0	$ (5,000,000)

VOYA RETIREMENT INSURANCE & ANNUITY Co 10-K