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Leases - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) store | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) store
Operating Leased Assets [Line Items] |  |  |  |  |
Office real estate optimization charges | $ 117 |  | $ 46 | $ 117 | $ 0
Number of stores, planned closure | store |  |  |  |  | 900
Store impairment charges |  |  | 0 | $ 0 | $ 1,358
Operating lease right-of-use asset |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Office real estate optimization charges | 71 |  | $ 20 |  |
Pharmacy & Consumer Wellness |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Number of stores, planned closure | store |  | 900 |  |  | 900
Number of stores, annual planned closures for closure period | store |  | 300 |  |  |
Store impairment charges |  | $ 1,400 |  |  | $ 1,400
Pharmacy & Consumer Wellness | Operating lease right-of-use asset |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Store impairment charges |  | 1,100 |  |  |
Operating lease, right-of-use asset, fair value |  | 356 |  |  | 356
Distribution centers and Corporate offices | Minimum |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Operating lease term (in years) |  |  | 15 years |  |
Finance lease term (in years) |  |  | 15 years |  |
Distribution centers and Corporate offices | Maximum |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Operating lease term (in years) |  |  | 25 years |  |
Finance lease term (in years) |  |  | 25 years |  |
Equipment | Minimum |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Operating lease term (in years) |  |  | 3 years |  |
Finance lease term (in years) |  |  | 3 years |  |
Equipment | Maximum |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Operating lease term (in years) |  |  | 10 years |  |
Finance lease term (in years) |  |  | 10 years |  |
Property and equipment |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Office real estate optimization charges | $ 44 |  | $ 18 |  |
Property and equipment | Pharmacy & Consumer Wellness |  |  |  |  |
Operating Leased Assets [Line Items] |  |  |  |  |
Store impairment charges |  | 261 |  |  |
Property and equipment, fair value |  | $ 185 |  |  | $ 185

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