v3.26.1
Investments, at Fair Value - Schedule of Investments at Fair Value (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments $ 1,052,997,380 $ 937,223,139
Short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 274,016 229,061
Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 75,177,993 62,798,457
Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 946,506,097 843,621,099
Group variable annuity    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 22,223,077 22,582,827
Common stock of Genworth Financial, Inc.    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 8,816,197 7,991,695
Fair Value, Inputs, Level 1, Level 2, and Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 1,052,997,380 937,223,139
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 274,016 229,061
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 75,177,993 62,798,457
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 30,810,766 22,894,014
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Balanced funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 44,367,227 39,904,443
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 946,506,097 843,621,099
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Money market funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 20,330,952 18,905,292
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Stable value funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 21,673,330 22,196,474
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 8,368,049 6,375,178
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 332,321,164 301,936,568
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Foreign blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 59,544,731 40,045,845
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Target maturity funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 504,267,871 454,161,742
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Group variable annuity    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 22,223,077 22,582,827
Fair Value, Inputs, Level 1, Level 2, and Level 3 | Common stock of Genworth Financial, Inc.    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 8,816,197 7,991,695
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 106,491,283 93,602,040
Level 1 | Short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 274,016 229,061
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 75,177,993 62,798,457
Level 1 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 30,810,766 22,894,014
Level 1 | Balanced funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 44,367,227 39,904,443
Level 1 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Money market funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Stable value funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Foreign blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Target maturity funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 1 | Group variable annuity    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 22,223,077 22,582,827
Level 1 | Common stock of Genworth Financial, Inc.    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 8,816,197 7,991,695
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 946,506,097 843,621,099
Level 2 | Short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Balanced funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 946,506,097 843,621,099
Level 2 | Money market funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 20,330,952 18,905,292
Level 2 | Stable value funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 21,673,330 22,196,474
Level 2 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 8,368,049 6,375,178
Level 2 | Blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 332,321,164 301,936,568
Level 2 | Foreign blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 59,544,731 40,045,845
Level 2 | Target maturity funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 504,267,871 454,161,742
Level 2 | Group variable annuity    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 2 | Common stock of Genworth Financial, Inc.    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Short-term investments    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Balanced funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Money market funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Stable value funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Bond funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Foreign blend funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Target maturity funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Group variable annuity    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments 0 0
Level 3 | Common stock of Genworth Financial, Inc.    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments $ 0 $ 0