Earnings Per Share (Average Common shares Outstanding Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Earnings Per Share [Abstract]
Income from Continuing Operations	$ 391	$ 344	$ 444	$ 470	$ 349	$ 823	$ 464	$ 556	$ 1,649	$ 2,192	$ 1,459
Less: Net income attributable to noncontrolling interests									(28)	(33)	0
Income from Continuing Operations Attributable to Kimberly-Clark Corporation									1,621	2,159	1,459
Income from Discontinued Operations, Net of Income Taxes									400	386	305
Net Income	$ 499	$ 446	$ 509	$ 567	$ 447	$ 907	$ 544	$ 647	$ 2,021	$ 2,545	$ 1,764
Weighted-Average Common Shares
Basic									331.9	335.6	337.8
Dilutive effect of stock options and RSU awards									1.3	1.4	1.0
Diluted									333.2	337.0	338.8
Basic:
Continuing operations	$ 1.14	$ 1.01	$ 1.33	$ 1.40	$ 1.03	$ 2.43	$ 1.35	$ 1.62	$ 4.88	$ 6.43	$ 4.32
Discontinued operations	0.36	0.33	0.20	0.31	0.31	0.27	0.26	0.30	1.21	1.15	0.90
Basic Earnings per Share	1.50	1.34	1.53	1.71	1.34	2.70	1.61	1.92	6.09	7.58	5.22
Diluted:
Continuing operations	1.14	1.01	1.33	1.39	1.03	2.42	1.35	1.61	4.86	6.41	4.31
Discontinued operations	0.36	0.33	0.20	0.31	0.31	0.27	0.26	0.30	1.21	1.14	0.90
Diluted Earnings per Share	$ 1.50	$ 1.34	$ 1.53	$ 1.70	$ 1.34	$ 2.69	$ 1.61	$ 1.91	$ 6.07	$ 7.55	$ 5.21