Cost Reduction Programs and Other Charges - Summary of Activity (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Restructuring Reserve [Roll Forward]
Balance, December 31, 2021	$ 453
2022 Cost Reduction Programs and Other Charges	(4)	$ (8)
Less: Cash payments / receipts	(30)
Foreign currency translation and other	(11)
Balance, March 31, 2022	408
Cost Reduction Program
Restructuring Reserve [Roll Forward]
Balance, December 31, 2021	422
2022 Cost Reduction Programs and Other Charges	4
Less: Cash payments / receipts	(35)
Foreign currency translation and other	(11)
Balance, March 31, 2022	380
Severance costs \| Cost Reduction Program
Restructuring Reserve [Roll Forward]
Balance, December 31, 2021	384
2022 Cost Reduction Programs and Other Charges	4	26
Less: Cash payments / receipts	(34)
Foreign currency translation and other	(8)
Balance, March 31, 2022	346
Other cost reduction charges \| Cost Reduction Program
Restructuring Reserve [Roll Forward]
Balance, December 31, 2021	38
2022 Cost Reduction Programs and Other Charges	0	18
Less: Cash payments / receipts	(1)
Foreign currency translation and other	(3)
Balance, March 31, 2022	34
Merger-related and other charges
Restructuring Reserve [Roll Forward]
Balance, December 31, 2021	31
2022 Cost Reduction Programs and Other Charges	(8)	$ (52)
Less: Cash payments / receipts	5
Foreign currency translation and other	0
Balance, March 31, 2022	$ 28

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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-Publisher FASB
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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of foreign currency translation gain (loss) which decreases (increases) the restructuring reserve.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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