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2018 Global Restructuring Program Narrative (Details)
$ in Millions
12 Months Ended 48 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2021
USD ($)
Employee
Restructuring Cost and Reserve          
Restructuring liabilities recorded in accrued expenses $ 75 $ 73     $ 75
2018 Global Restructuring Program          
Restructuring Cost and Reserve          
Restructuring liabilities recorded in accrued expenses 75 73     75
Restructuring Charges     $ 302,000 $ 325,000  
Restructuring liabilities recorded in other liabilities 3 20     $ 3
Restructuring and Related Cost, Number of Positions Eliminated | Employee         6,000
Restructuring and Related Cost, Number of Positions Eliminated | Employee         6,000
2018 Global Restructuring Program | After Tax          
Restructuring Cost and Reserve          
Restructuring Charges 279 325 248 793 $ 1,645
Restructuring and Related Cost, Incurred Cost         1,600
2018 Global Restructuring Program | Before Tax          
Restructuring Cost and Reserve          
Restructuring Charges $ 354 $ 419 $ 366 $ 1,036 2,175
Restructuring and Related Cost, Incurred Cost         2,200
2018 Global Restructuring Program | Cash charges          
Restructuring Cost and Reserve          
Restructuring and Related Cost, Incurred Cost         1,200
2018 Global Restructuring Program | Non-cash charges | Before Tax          
Restructuring Cost and Reserve          
Restructuring and Related Cost, Incurred Cost         $ 1,000