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v3.20.2

Reserves for Credit Losses (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jan. 01, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Reserve for Losses [Roll Forward] |  |  |  |  |
Balance, January 1 | $ 2,383 |  |  | $ 2,383 |
Provisions |  | $ 969 | $ 603 | 2,845 | $ 1,128
Balance, June 30 |  | 5,628 |  | 5,628 |
Accounting Standards Update [Extensible List] | us-gaap:AccountingStandardsUpdate201613Member |  |  |  |
Principal write-offs, recoveries |  |  |  | 279 | 254
Cumulative effect of change in accounting principle - Reserve for Credit Losses |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Increase related to adoption of the CECL methodology | $ 1,643 |  |  |  |
Cumulative effect of change in accounting principle - Reserve for Credit Losses, adjusted balance |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Balance, January 1 | $ 4,027 |  |  | 4,027 | 2,134
Other |  |  |  | (17) | 12
Balance, June 30 |  | $ 5,628 | $ 2,168 | 5,628 | 2,168
Net Write Offs [Member] | Cumulative effect of change in accounting principle - Reserve for Credit Losses, adjusted balance |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Provisions |  |  |  | 2,845 | 1,128
Principal [Member] | Cumulative effect of change in accounting principle - Reserve for Credit Losses, adjusted balance |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Net write-offs, principal, interest and fees |  |  |  | (1,017) | (920)
Interest and Fees [Member] | Cumulative effect of change in accounting principle - Reserve for Credit Losses, adjusted balance |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Net write-offs, principal, interest and fees |  |  |  | (210) | (186)
Troubled Debt Restructuring [Member] |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Net write-offs, principal, interest and fees |  |  |  | (63) | (33)
Foreign Currency Translation Adjustments [Member] |  |  |  |  |
Reserve for Losses [Roll Forward] |  |  |  |  |
Other |  |  |  | $ (17) | $ 3

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