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Pension Plans and Other Retirement Benefits (Tables)
 9 Months Ended
Oct. 30, 2021
Retirement Benefits [Abstract]  
Financial Information Related to Funded Defined Benefit Pension Plan and Unfunded Supplemental Retirement Plan Presented below is financial information relating to TJX’s funded defined benefit pension plan (“qualified pension plan” or “funded plan”) and its unfunded supplemental pension plan (“unfunded plan”) for the periods shown:
 Funded PlanUnfunded Plan
 Thirteen Weeks EndedThirteen Weeks Ended
In thousandsOctober 30,
2021		October 31,
2020		October 30,
2021		October 31,
2020
Service cost$11,900 $12,512 $309 $404 
Interest cost13,073 12,620 764 860 
Expected return on plan assets(24,017)(22,264)— — 
Amortization of net actuarial loss and prior service cost3,358 6,028 1,076 1,394 
Total expense$4,314 $8,896 $2,149 $2,658 
Funded PlanUnfunded Plan
Thirty-Nine Weeks EndedThirty-Nine Weeks Ended
In thousandsOctober 30,
2021		October 31,
2020		October 30,
2021		October 31,
2020
Service cost$36,837 $37,592 $1,819 $1,822 
Interest cost39,073 37,658 2,324 2,462 
Expected return on plan assets(72,001)(66,748)— — 
Amortization of net actuarial loss and prior service cost10,858 17,046 3,385 3,462 
Total expense$14,767 $25,548 $7,528 $7,746