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Pension Plans and Other Retirement Benefits (Tables)
 9 Months Ended
Oct. 29, 2022
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 29,
2022		October 30,
2021		October 29,
2022		October 30,
2021
Service cost$11,946 $11,900 $238 $309 
Interest cost14,806 13,073 1,018 764 
Expected return on plan assets(22,236)(24,017)— — 
Amortization of net actuarial loss and prior service cost5,050 3,358 952 1,076 
Total expense$9,566 $4,314 $2,208 $2,149 
Funded PlanUnfunded Plan
Thirty-Nine Weeks EndedThirty-Nine Weeks Ended
In thousandsOctober 29,
2022		October 30,
2021		October 29,
2022		October 30,
2021
Service cost$36,282 $36,837 $1,693 $1,819 
Interest cost43,658 39,073 2,880 2,324 
Expected return on plan assets(66,693)(72,001)— — 
Amortization of net actuarial loss and prior service cost13,600 10,858 2,709 3,385 
Total expense$26,847 $14,767 $7,282 $7,528