Postretirement Benefit Plans - Additional Information (Details) - USD ($) shares in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit pension plan formula, highest consecutive years of compensation (in years)	5 years
Length of time certain gains and losses are considered when determining the market-related value of assets related to the U.S. Qualified pension and retiree health care plans (in years)	3 years
Expected contribution to retirement benefit plans in next fiscal year	$ 25,000,000
Liability to participants of the deferred compensation plan	492,000,000
Deferred compensation plan assets	11,000,000
Defined Benefit \| Equity investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets directly invested in TI common stock	0
Retiree Health Care \| Equity investments
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined benefit plan assets directly invested in TI common stock	$ 0
U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Number of company shares held by the U.S. defined contribution plans at year-end (in shares)	4	5
Value of the company shares held by the U.S. defined contribution plans at year-end	$ 699,000,000	$ 852,000,000
Dividends paid on the company shares held by the U.S. defined contribution plans at year-end	24,000,000	26,000,000
Aggregate expense for the U.S. defined contribution plans	$ 74,000,000	$ 76,000,000	$ 75,000,000
U.S. \| Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (expense), net (OI&E)	Other income (expense), net (OI&E)	Other income (expense), net (OI&E)
Accumulated benefit obligation	$ 440,000,000	$ 470,000,000
Non-U.S.
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Value of the company shares held by the non-U.S. retirement plans at year-end	32,000,000	34,000,000
Non-U.S. \| Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated benefit obligation	$ 1,470,000,000	$ 1,470,000,000
Defined contribution plan, also still accruing defined benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer matching contribution (percent)	2.00%
Enhanced defined contribution plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined contribution plan, employer matching contribution (percent)	4.00%
Defined contribution plan, employer fixed contribution (percent)	2.00%

TEXAS INSTRUMENTS INC 10-K