Cost Reduction Programs and Other Charges - Schedule of Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 141	$ 24	$ 230	$ 43
Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	42		51
Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	34		58
Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	65		121
Operating Segments | Americas
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	29		54
Operating Segments | Americas | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	20		20
Operating Segments | Americas | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	6		7
Operating Segments | Americas | Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	3		27
Operating Segments | EMEA
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	16		15
Operating Segments | EMEA | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	4		4
Operating Segments | EMEA | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	2		9
Operating Segments | EMEA | Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	10		2
Operating Segments | APAC
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	15		25
Operating Segments | APAC | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	13		22
Operating Segments | APAC | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		2
Operating Segments | APAC | Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	1		1
Operating Segments | Engineering
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	4		11
Operating Segments | Engineering | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		0
Operating Segments | Engineering | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	4		11
Operating Segments | Engineering | Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	0		0
Operating Segments | Other
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	77		125
Operating Segments | Other | Severance costs
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	5		5
Operating Segments | Other | Other cost reduction charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	21		29
Operating Segments | Other | Transaction related charges
Restructuring Cost and Reserve [Line Items]
Cost reduction programs and other charges	$ 51		$ 91