Stock Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 02, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of shares remaining available for future issuance		50,167,414
Future compensation not yet recognized in the Statements of Income		$ 224
Future compensation to be recognized in 2019		110
Future compensation to be recognized in 2020		72
Future compensation to be recognized in 2021		37
Future compensation to be recognized in 2022		5
Remaining stock repurchase authorizations		$ 16,140
Employee stock purchase plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Percent of the underlying common stock's market price participants pay for options (in hundredths)		85.00%
ESPP option term (in months)		three-month
Number of shares remaining available for future issuance		34,555,101
Aggregate intrinsic values of options exercised		$ 13	$ 13	$ 12
Weighted-average exercise price, Exercised (in dollars per share)		$ 90.06
Outstanding options exercisable (in shares)		0
Weighted average grant date fair value of options granted (dollars per share)		$ 15.43	$ 12.99	$ 9.79
Employee stock purchase plan | Subsequent Event
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Weighted-average exercise price, Exercised (in dollars per share)	$ 80.29
Employee Stock Option
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Look back period to determine option life used in Black Scholes Merton pricing model		10 years
Long-term incentive and director compensation plans | Employee Stock Option
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Term of the long term incentive stock options		10 years
Award vesting period (in years)		4 years
Aggregate intrinsic values of options exercised		$ 561	$ 632	$ 424
Future compensation not yet recognized in the Statements of Income		$ 97
Weighted-average exercise price, Exercised (in dollars per share)		$ 42.63
Outstanding options exercisable (in shares)		23,625,802
Long-term incentive and director compensation plans | Restricted Stock Units (RSUs)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period (in years)		4 years
Long-term incentive plan RSU conversion to common stock feature		Each RSU represents the right to receive one share of TI common stock on the vesting date
Weighted-average grant-date fair value, Granted (in dollars per share)		$ 110.05	$ 79.52	$ 53.98
Total fair values of shares vested from RSU lapses		$ 123	$ 149	$ 178
Future compensation not yet recognized in the Statements of Income		$ 127