Business, Basis of Presentation and Significant Accounting Policies (Details)		12 Months Ended
	Jan. 24, 2023 USD ($)	Dec. 31, 2024 USD ($) segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Accounting Policies [Line Items]
Number of operating segments | segment		3
Net gains (losses)		$ (27,000,000)	$ (72,000,000)	$ (686,000,000)
Goodwill		748,000,000	748,000,000	327,000,000
Payments for business acquisitions, net of cash acquired		0	584,000,000	2,000,000
Contract cost assets		105,000,000	98,000,000
Amortization expense		21,000,000	20,000,000	$ 21,000,000
Impairment loss for contract costs capitalized		$ 0
Fixed Annuities And Payout Contracts Without Life Contingencies [Member]
Accounting Policies [Line Items]
Credited interest rate maximum on fixed annuities and payout contracts without life contingencies		5.10%
Minimum
Accounting Policies [Line Items]
Weighted Average Amortization Lives		5 years
Minimum | Software subscriptions and services
Accounting Policies [Line Items]
Revenue from contract with customer, contract term		1 year
Maximum
Accounting Policies [Line Items]
Weighted Average Amortization Lives		15 years
Maximum | Software subscriptions and services
Accounting Policies [Line Items]
Revenue from contract with customer, contract term		3 years
Commercial Portfolio Segment
Accounting Policies [Line Items]
Threshold period past due		60 days
Threshold period past due, nonaccrual		90 days
Customer relationship lists
Accounting Policies [Line Items]
Weighted Average Amortization Lives		17 years
Computer software
Accounting Policies [Line Items]
Weighted Average Amortization Lives		5 years
Benefitfocus
Accounting Policies [Line Items]
Payments to acquire businesses	$ 583,000,000
Goodwill	319,000,000
Payments for merger related costs	595,000,000
Payments for business acquisitions, net of cash acquired	558,000,000
Cash acquired from acquisition	25,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, cash and equivalents	49,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, intangible assets, other than goodwill	275,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax assets	45,000,000
Business combination, recognized identifiable assets acquired and liabilities assumed, lease obligation	91,000,000
Benefitfocus | Customer relationship lists
Accounting Policies [Line Items]
Finite-lived intangible assets acquired	$ 190,000,000
Acquired finite-lived intangible assets, weighted average useful life	15 years
Benefitfocus | Computer software
Accounting Policies [Line Items]
Finite-lived intangible assets acquired	$ 70,000,000
Acquired finite-lived intangible assets, weighted average useful life	5 years
Voya India
Accounting Policies [Line Items]
Net gains (losses)		$ 45,000,000	$ 45,000,000
Goodwill		$ 102,000,000
Voya India
Accounting Policies [Line Items]
Subsidiary, ownership percentage, parent		49.00%
SLK
Accounting Policies [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		51.00%
VIM Holdings
Accounting Policies [Line Items]
Subsidiary, ownership percentage, noncontrolling owner		24.00%
OneAmerica
Accounting Policies [Line Items]
Payments to acquire businesses		$ 50,000,000
Other payments to acquire businesses		160,000,000
VFI SLK
Accounting Policies [Line Items]
Payments to acquire businesses		$ 53,000,000