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Accounting Policies (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deconsolidation, Gain (Loss), Amount $ 0 $ 11 $ (153)
K-C Venezuela      
Charge for Venezuelan Balance Sheet Remeasurement     (45)
K-C Venezuela | After Tax      
Deconsolidation, Gain (Loss), Amount     $ (102)
Trademarks | Minimum      
Intangible assets estimated useful life 2 years    
Trademarks | Maximum      
Intangible assets estimated useful life 20 years    
Patents, Developed Technologies & Other Intangible Assets | Minimum      
Intangible assets estimated useful life 5 years    
Patents, Developed Technologies & Other Intangible Assets | Maximum      
Intangible assets estimated useful life 15 years    
Building      
Estimated useful life 40 years    
Machinery and Equipment | Minimum      
Estimated useful life 16 years    
Machinery and Equipment | Maximum      
Estimated useful life 20 years    
Software      
Estimated useful life 5 years