Unsecured Borrowings - Unsecured Long-Term Borrowings after Hedging (Detail) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Fixed-rate obligations: At fair value	$ 1,429	$ 725
Fixed rate obligations at amortized cost	30,909	47,577
Floating-rate obligations: At fair value	38,899	42,936
Floating rate obligations at amortized cost	142,699	115,838
Total	$ 213,936	$ 207,076

The amount of of unsecured long-term borrowings with fixed rates, after hedging at amortized cost.

No definition available.

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- Definition

The amount of of unsecured long-term borrowings with fixed rates, after hedging at fair value.

+ References

No definition available.

+ Details

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- Definition

The amount of of unsecured long-term borrowings with floating rates, after hedging at amortized cost.

+ References

No definition available.

+ Details

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- Definition

The amount of of unsecured long-term borrowings with floating rates, after hedging at fair value.

+ References

No definition available.

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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