v3.26.1
FAIR VALUE MEASUREMENTS (Details) - EBP 001 - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 264,684,488 $ 251,958,683
Level 1, Level 2, and Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 112,263,020 112,975,810
Level 1, Level 2, and Level 3 | Sleep Number Corporation common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 3,585,898 4,632,030
Level 1, Level 2, and Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 103,436,677 103,377,443
Level 1, Level 2, and Level 3 | Self-directed brokerage account    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 5,240,445 4,966,337
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 112,263,020 112,975,810
Level 1 | Sleep Number Corporation common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 3,585,898 4,632,030
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 103,436,677 103,377,443
Level 1 | Self-directed brokerage account    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 5,240,445 4,966,337
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Sleep Number Corporation common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Self-directed brokerage account    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Sleep Number Corporation common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Self-directed brokerage account    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Net asset value | Collective Trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 152,421,468 $ 138,982,873