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Cost Reduction Programs and Other Charges - Schedule of Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 48	$ 125	$ 428	$ 355
Merger-related divestitures		92		213
Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges		$ 33		$ 142
Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	9		98
Operating Segments | Americas
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	8		68
Operating Segments | Americas | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	6		12
Operating Segments | EMEA
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	26		168
Operating Segments | EMEA | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	5		5
Operating Segments | APAC
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		10
Operating Segments | APAC | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		3
Operating Segments | Engineering
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		36
Operating Segments | Engineering | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		8
Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	12		146
Operating Segments | Other | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(2)		70
Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	39		330
Cost Reduction Program | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	31		281
Cost Reduction Program | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	8		49
Cost Reduction Program | Operating Segments | Americas
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		56
Cost Reduction Program | Operating Segments | Americas | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		33
Cost Reduction Program | Operating Segments | Americas | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		23
Cost Reduction Program | Operating Segments | EMEA
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	21		163
Cost Reduction Program | Operating Segments | EMEA | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	17		155
Cost Reduction Program | Operating Segments | EMEA | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	4		8
Cost Reduction Program | Operating Segments | APAC
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		7
Cost Reduction Program | Operating Segments | APAC | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		5
Cost Reduction Program | Operating Segments | APAC | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		2
Cost Reduction Program | Operating Segments | Engineering
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		28
Cost Reduction Program | Operating Segments | Engineering | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		22
Cost Reduction Program | Operating Segments | Engineering | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(1)		6
Cost Reduction Program | Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	14		76
Cost Reduction Program | Operating Segments | Other | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	9		66
Cost Reduction Program | Operating Segments | Other | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 5		$ 10

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Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

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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.

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