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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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring and other (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
Restructuring and other (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 32	$ 16	$ 53	$ 38
Employee severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other	1	12	2	30
Employee severance \| Contingencies Related to COVID-19 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other	10		24
Restructuring, integration and other(2)
Restructuring Cost and Reserve [Line Items]
Restructuring and other	$ 31	$ 4	$ 51	$ 8