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Supplemental financial information - Restructuring Charges, Other (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Disclosure Text Block Supplement [Abstract] |  |
Restructuring charges/other | $ 0 | $ (124)

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- Definition Restructuring Charges And Other, Net + References No definition available. + Details
Name: | txn_RestructuringChargesAndOtherNet
Namespace Prefix: | txn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_DisclosureTextBlockSupplementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration