OTHER - Narrative (Details) € in Millions, $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020 USD ($) country	Sep. 30, 2020 USD ($) country	Mar. 31, 2020 EUR (€)	Mar. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Number of countries in which the entity commenced restructuring actions (more than) | country	40	40
Restructuring and other exit costs	$ 41	$ 75
Cash payments for restructuring		50
Restructuring liability	22	22
Restructuring and other exit costs, estimated additional restructuring expenses to be recorded	100	100
Government grants and other assistance benefit recognized	22	122
Proceeds from government programs		95
Grants receivable	27	27
Noncash
Restructuring Cost and Reserve [Line Items]
Restructuring and other exit costs	$ 1	$ 3
Tax and Customs Administration, Netherlands
Restructuring Cost and Reserve [Line Items]
Prepaid taxes			€ 660	$ 717