v3.26.1
Accumulated Other Comprehensive Loss (Changes In and Reclassifications Out of Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Feb. 28, 2026
Feb. 28, 2025
Feb. 29, 2024
Feb. 28, 2023
Actuarial (loss) gain arising during the year $ (3,694) $ 1,011 $ 9,289  
Tax benefit (expense) 874 (240) (2,208)  
Actuarial (loss) gain arising during the year, net of tax (2,820) 771 7,081  
Actuarial loss amortization reclassifications in net pension expense 398 442 516  
Tax expense (94) (105) (123)  
Amortization reclassifications recognized in net pension expense, net of tax 304 337 393  
Net change in retirement benefit plan unrecognized actuarial losses, net of tax (2,516) 1,108 7,474  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax (13,102) (23,662) (9,291)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax (3,205) (6,077) (2,348)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax (9,897) (17,585) (6,943)  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax 32,826 51,808 52,354  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax 7,980 12,086 13,233  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax 24,846 39,722 39,121  
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax (34,743) (57,307) (46,064)  
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, before Tax, Portion Attributable to Parent 70 0 0  
Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent (17) 0 0  
Total other comprehensive loss, net of tax (37,206) (56,199) (38,590)  
Accumulated Other Comprehensive Income (Loss), Net of Tax (34,126) 3,080 59,279 $ 97,869
Other comprehensive (loss) income (37,206) (56,199) (38,590)  
Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent 53 0 0  
TOTAL COST OF SALES        
Actuarial loss amortization reclassifications in net pension expense 172 195 231  
CarMax Auto Finance income        
Actuarial loss amortization reclassifications in net pension expense 14 15 15  
Selling, general and administrative expenses        
Actuarial loss amortization reclassifications in net pension expense 212 232 270  
Unrecognized Actuarial Losses [Member]        
Accumulated Other Comprehensive Income (Loss), Net of Tax (38,524) (36,008) (37,116) (44,590)
Other comprehensive (loss) income (2,516) 1,108 7,474  
Unrecognized Hedge Losses [Member]        
Accumulated Other Comprehensive Income (Loss), Net of Tax 4,345 39,088 96,395 142,459
Other comprehensive (loss) income (34,743) (57,307) (46,064)  
AOCI Attributable to Parent [Member]        
Other comprehensive (loss) income (37,206) (56,199) (38,590)  
Net unrecognized beneficial interests gains (losses)        
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 53 0 0 $ 0
Other comprehensive (loss) income   $ 0 $ 0