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Summary of main information by class of underlying assets (Details) - Previously Reported [Member] - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | $ 31,008 | $ 31,427
Not later than one year [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | 2,861 | 5,567
Later than one year and not later than two years [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | 4,686 | 3,944
Later than two years and not later than three years [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | 3,528 | 3,027
Later than three years and not later than four years [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | 2,586 | 2,309
Later than four years and not later than five years [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | 2,062 | 1,972
Later than five years [member] |  |
DisclosureLeaseliabilitiesLineItems [Line Items] |  |
Balance at december 31 2021 | $ 15,285 | $ 14,608

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- Definition The element represents nominal value of lease payments. + References No definition available. + Details
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