Derivative instruments (Fair Value of Derivatives) (Details) - Derivatives designated as hedging instrument [Member] - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Assets
Total derivative assets, fair value	$ 300	$ 265
Liabilities
Total derivative liabilities, fair value	865	534
Foreign currency contracts [Member] | Other current assets/Other assets [Member]
Assets
Total derivative assets, fair value	235	183
Foreign currency contracts [Member] | Accrued liabilities/Other noncurrent liabilities [Member]
Liabilities
Total derivative liabilities, fair value	51	39
Cross-currency swap contracts [Member] | Other current assets/Other assets [Member]
Assets
Total derivative assets, fair value	65	66
Cross-currency swap contracts [Member] | Accrued liabilities/Other noncurrent liabilities [Member]
Liabilities
Total derivative liabilities, fair value	358	339
Interest rate swap contracts [Member] | Other current assets/Other assets [Member]
Assets
Total derivative assets, fair value	0	16
Interest rate swap contracts [Member] | Accrued liabilities/Other noncurrent liabilities [Member]
Liabilities
Total derivative liabilities, fair value	$ 456	$ 156