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Derivative instruments (Details Textual) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Net cash provided by operating activities | $ 2,134 | $ 1,845 |
Foreign currency and cross currency swap contracts [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Amounts expected to be reclassified from AOCI into earnings over the next 12 months, foreign currency and cross-currency swaps | (162) |  |
Derivatives designated as hedging instrument [Member] | Foreign currency forward contracts [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, notional amount | 4,900 |  | $ 5,000
Derivatives designated as hedging instrument [Member] | Interest Rate Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, notional amount | 7,400 |  | 9,600
Value of derivative contracts terminated | 2,200 |  |
Value of derivative contracts terminated resulting in net cash provided by operating activities | 5,200 |  |
Net cash provided by operating activities | 576 |  |
Derivatives not designated as hedging instrument [Member] | Foreign currency forward contracts [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Derivative, notional amount | 800 |  | 1,200
Interest Expense, Net [Member] | Interest Rate Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Gain recognized from termination of contracts | 17 |  |
Long-term debt [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Hedged Liability, Fair Value Hedge | 7,784 |  | $ 8,814
Long-term debt [Member] | Interest Rate Swap, At-Then Current Interest Rates [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Hedged Liability, Fair Value Hedge | $ 5,200 |  |

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- Definition Derivative, Notional Amount, Amount Terminated Resulting In Net Cash Provided By Operating Activities + References No definition available. + Details
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- Definition Amount of increase in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 + Details
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