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Contingencies and Commitments (Narrative) (Details)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 19, 2019
USD ($)
Jul. 12, 2017
USD ($)
Nov. 30, 2019
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2010
patent
Jan. 01, 2019
USD ($)
Payments for legal settlements       $ 54            
Lease expense         $ 133          
Lease expense           $ 138 $ 125      
Right of use asset         384          
Minimum                    
Estimate of possible loss         275          
Maximum                    
Estimate of possible loss         $ 520          
Zimmer Product Infringement                    
Number of patents allegedly infringed upon | patent                 3  
Gain contingency, damages awarded, value   $ 164           $ 76    
Proceeds from legal settlements $ 167                  
Gain recorded in selling, general and administrative expenses     $ 100              
Accounting Standards Update 2016-02                    
Right of use asset                   $ 350
Operating lease, liability                   $ 350