Cost Reduction Programs and Other Charges - Schedule of Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 26	$ 48	$ 222	$ 428
Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges		$ 31		$ 281
Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(3)		(55)
Americas
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(3)		2
Americas | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	(4)		(4)
EMEA
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	17		220
EMEA | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		0
APAC
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		(44)
APAC | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		(53)
Engineering
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		13
Engineering | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		0
Other
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	12		31
Other | Merger-related and other charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		2
Cost Reduction Program
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	29		277
Cost Reduction Program | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	20		228
Cost Reduction Program | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	9		49
Cost Reduction Program | Americas
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		6
Cost Reduction Program | Americas | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		4
Cost Reduction Program | Americas | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		2
Cost Reduction Program | EMEA
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	17		220
Cost Reduction Program | EMEA | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	15		197
Cost Reduction Program | EMEA | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		23
Cost Reduction Program | APAC
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		9
Cost Reduction Program | APAC | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		7
Cost Reduction Program | APAC | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		2
Cost Reduction Program | Engineering
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		13
Cost Reduction Program | Engineering | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		7
Cost Reduction Program | Engineering | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		6
Cost Reduction Program | Other
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	11		29
Cost Reduction Program | Other | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	4		13
Cost Reduction Program | Other | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 7		$ 16