Financial Instruments (Aggregate Fair Value and Carrying Value) (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Carrying value	$ 26,291	$ 28,044
Fair value	21,614	30,459
Foreign currency denominated debt included in long-term debt above:
Carrying value	26,291	28,044
Foreign Currency Denominated Debt [Member]
Derivative [Line Items]
Carrying value	4,156	4,817
Foreign currency denominated debt included in long-term debt above:
Carrying value	4,156	4,817
Fair value	$ 3,780	$ 5,114

Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant