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Restructuring - Charges Activities by Type of Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs $ 868 $ 880 $ 915
Cost of sales      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 160 175 251
Selling, general and administrative      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 19 47 34
Research and development      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 28 83 4
Restructuring costs      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 661 575 626
Separation Costs      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 451 385 572
Separation Costs | Cost of sales      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 0 0 0
Separation Costs | Selling, general and administrative      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 0 0 0
Separation Costs | Research and development      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 0 0 0
Separation Costs | Restructuring costs      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 451 385 572
Accelerated Depreciation      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 91 268 233
Accelerated Depreciation | Cost of sales      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 52 143 198
Accelerated Depreciation | Selling, general and administrative      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 12 44 33
Accelerated Depreciation | Research and development      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 27 81 2
Accelerated Depreciation | Restructuring costs      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 0 0 0
Other      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 326 227 110
Other | Cost of sales      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 108 32 53
Other | Selling, general and administrative      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 7 3 1
Other | Research and development      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs 1 2 2
Other | Restructuring costs      
Restructuring Cost and Reserve [Line Items]      
Total pretax restructuring costs $ 210 $ 190 $ 54