Annual report pursuant to Section 13 and 15(d)

Postretirement Health Care and Life Insurance Benefits (Narrative) (Details)

v3.21.1
Postretirement Health Care and Life Insurance Benefits (Narrative) (Details)
$ in Millions
12 Months Ended
Jan. 30, 2021
USD ($)
Expected Federal Subsidy [Abstract]  
Estimated amount for entire time period presented $ 1
Maximum [Member]  
Expected Federal Subsidy [Abstract]  
2021 1
2022 1
2023 1
2024 1
2025 1
2026-2030 $ 1