Equity - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	$ (5,263)	$ (3,380)
Derivatives - net of taxes	(21)	(27)
Pension / OPEB (net of $422 million and $446 million tax benefit in June 30, 2020 and December 31, 2019, respectively)	(1,337)	(1,407)
Accumulated other comprehensive income (loss) (Note 11)	(6,621)	(4,814)
Pension / OPEB funded status obligation, tax benefit	(422)	(446)
Americas
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	(4,090)	(3,357)
EMEA
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	(876)	(136)
APAC
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	(455)	(140)
Engineering
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	(43)	(29)
Other
Segment Reporting Information [Line Items]
Cumulative translation adjustment - net of taxes	$ 201	$ 282