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Income taxes - Narrative (Details) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 19, 2022 case | Apr. 28, 2022 USD ($) | May 31, 2021 USD ($) notice
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Interest and penalties related to unrecognized tax benefits recognized in income tax provision | $ 287,000,000 | $ 189,000,000 | $ 98,000,000 |  |  |
Accrued interest and penalties associated with unrecognized tax benefits | 1,400,000,000 | 1,100,000,000 |  |  |  |
Income taxes paid | 3,400,000,000 | $ 2,400,000,000 | $ 1,900,000,000 |  |  |
Federal |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Tax credit carryforwards available to reduce income taxes | 201,000,000 |  |  |  |  |
NOL carryforwards available to reduce income taxes | 869,000,000 |  |  |  |  |
NOL carryforwards, valuation allowance | 0 |  |  |  |  |
NOLs with no valuation allowance and no expiration | 691,000,000 |  |  |  |  |
Number of notices on proposed additional tax | notice |  |  |  |  |  | 2
Proposed additional income tax |  |  |  |  |  | $ 3,600,000,000
Repatriation tax on proposed additional tax |  |  |  |  |  | $ 900,000,000
Proposed additional income tax 2013-2015 |  |  |  |  | $ 5,100,000,000 |
Penalties on proposed additional income tax 2013-2105 |  |  |  |  | 2,000,000,000 |
Repatriation tax on proposed additional tax 2013-2015 |  |  |  |  | $ 2,200,000,000 |
Number of notices consolidated in court | case |  |  |  | 2 |  |
Federal | Expiration in tax years between 2023 and 2043 |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Tax credit carryforwards, valuation allowance | 19,000,000 |  |  |  |  |
State |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Tax credit carryforwards available to reduce income taxes | 1,100,000,000 |  |  |  |  |
Tax credit carryforwards, valuation allowance | 971,000,000 |  |  |  |  |
NOL carryforwards available to reduce income taxes | 872,000,000 |  |  |  |  |
NOL carryforwards, valuation allowance | 738,000,000 |  |  |  |  |
Foreign |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
Tax credit carryforwards available to reduce income taxes | 84,000,000 |  |  |  |  |
Tax credit carryforwards, valuation allowance | 59,000,000 |  |  |  |  |
NOL carryforwards available to reduce income taxes | 1,300,000,000 |  |  |  |  |
NOL carryforwards, valuation allowance | 238,000,000 |  |  |  |  |
NOLs with no valuation allowance and no expiration | 243,000,000 |  |  |  |  |
Foreign | Operating Losses That Expire Between 2022 and 2031 |  |  |  |  |  |
Tax Credit Carryforward [Line Items] |  |  |  |  |  |
NOL carryforwards, valuation allowance | $ 0 |  |  |  |  |

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