Debt - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Proceeds from long-term borrowings	$ 41,400	$ 31,500
Repayments of debt and capital lease obligations	18,900	17,200
Repayments of debt	9,078
Asset-Backed Debt
Debt Instrument [Line Items]
Proceeds from long-term borrowings	8,400	5,600
Repayments of debt	4,800	$ 7,400
Green Bond
Debt Instrument [Line Items]
Proceeds from long-term borrowings	$ 1,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

+ Details

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585

+ Details

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Balance Type:	debit
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- Definition

The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

+ Details

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- Definition

Amount of cash outflow for short-term and long-term debt and lease obligation.

+ References

No definition available.

+ Details

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- Details

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- Details

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