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Commitments and Contingencies (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 01, 2022 | Oct. 31, 2021 patent | Apr. 30, 2020 plaintiff agreement | Dec. 31, 2019 USD ($) patent opposingParty | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2021 USD ($) lawsuit plaintiff | Dec. 31, 2016 party
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of additional patents allegedly infringed | patent |  | 2 |  |  |  |  |  |  |
Number of patents allegedly infringed, scenario two | patent |  |  |  | 2 |  |  |  |  |
Number of patents allegedly infringed, scenario one | patent |  |  |  | 4 |  |  |  |  |
Purchase commitments, year one |  |  |  |  |  | $ 1,100 |  | $ 1,100 |
Purchase commitments, year two |  |  |  |  |  | 450 |  | 450 |
Purchase commitments, year three |  |  |  |  |  | 243 |  | 243 |
Purchase commitments, year four |  |  |  |  |  | 60 |  | 60 |
Purchase commitments, year five |  |  |  |  |  | 31 |  | $ 31 |
ViiV |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Pre-tax charge to cost of goods sold |  |  |  |  |  | $ 1,250 |  |  |
ViiV | Forecast |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Payments for legal settlements |  |  |  |  | $ 1,250 |  |  |  |
ViiV | Subsequent event |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Royalty percentage on future sales | 3.00% |  |  |  |  |  |  |  |
Juno |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Amount reversed against previously recorded litigation accrual |  |  |  |  |  |  | $ 175 |  |
Damages awarded |  |  |  | $ 585 |  |  |  |  |
Running royalty rate from October 2017 |  |  |  | 27.60% |  |  |  |  |
Enhanced damages on past sales |  |  | 50.00% |  |  |  |  |  |
Running royalty rate on future sales |  |  | 27.60% |  |  |  |  |  |
Pre-Exposure Prophylaxis |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of material transfer agreements | agreement |  |  | 4 |  |  |  |  |  |
European Patent Claims 2024 Expiration |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of parties appealed | opposingParty |  |  |  | 2 |  |  |  |  |
European Patent Claims 2026 Expiration |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of parties appealed | opposingParty |  |  |  | 3 |  |  |  |  |
European Patent Claims 2032 Expiration |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of parties appealed | opposingParty |  |  |  | 3 |  |  |  |  |
European Patent Claims 2027 Expiration |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of parties appealed | opposingParty |  |  |  | 2 |  |  |  |  |
Number of parties filing opposition | party |  |  |  |  |  |  |  |  | 3
Product Liability |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of claims filed | lawsuit |  |  |  |  |  |  |  | 1 |
Number of plaintiffs | plaintiff |  |  |  |  |  |  |  | 27,000 |
Qui Tam |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Number of plaintiffs | plaintiff |  |  | 2 |  |  |  |  |  |

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