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Fair Value (Fair Value Measurements - Recurring Basis) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | $ 613 | $ 616
Derivative assets | 12 | 28
Derivative liabilities | $ 0 | $ (1)
Investment in any one industry did not exceed percentage | 11.00% | 13.00%
Fair value, measurements, recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | $ 29,225 | $ 30,284
Derivative assets | 14 | 64
Assets, fair value | 29,952 | 31,007
Derivative liabilities | (2) | (5)
Liabilities, fair value | 2 | 5
Fair value, measurements, recurring | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities |  | (5)
Fair value, measurements, recurring | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities | (2) |
Fair value, measurements, recurring | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 613 | 616
Fair value, measurements, recurring | US Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 807 | 2,048
Fair value, measurements, recurring | US States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 913 | 641
Fair value, measurements, recurring | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 162 | 186
Fair value, measurements, recurring | Agency mortgage-backed | Residential Mortgage |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 19,884 | 21,404
Fair value, measurements, recurring | Agency mortgage-backed | Commercial Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 1,786 | 1,382
Fair value, measurements, recurring | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 3,425 | 2,850
Fair value, measurements, recurring | Mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 38 | 42
Fair value, measurements, recurring | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 356 | 368
Fair value, measurements, recurring | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 1,854 | 1,363
Fair value, measurements, recurring | Loans held-for-sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage loans held-for-sale, fair value | 91 | 30
Fair value, measurements, recurring | Finance receivables and loans, net | Consumer portfolio segment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Finance receivables and loans, net | 8 | 11
Fair value, measurements, recurring | Interests retained in financial asset sales |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Retained interest, fair value | 1 | 2
Fair value, measurements, recurring | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 12 | 64
Fair value, measurements, recurring | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 2 |
Fair value, measurements, recurring | Fair value, inputs, level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 822 | 2,062
Derivative assets | 2 | 0
Assets, fair value | 1,432 | 2,670
Derivative liabilities | (2) | 0
Liabilities, fair value | 2 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities |  | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities | (2) |
Fair value, measurements, recurring | Fair value, inputs, level 1 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 608 | 608
Fair value, measurements, recurring | Fair value, inputs, level 1 | US Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 807 | 2,047
Fair value, measurements, recurring | Fair value, inputs, level 1 | US States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 15 | 15
Fair value, measurements, recurring | Fair value, inputs, level 1 | Agency mortgage-backed | Residential Mortgage |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Agency mortgage-backed | Commercial Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Loans held-for-sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage loans held-for-sale, fair value | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Finance receivables and loans, net | Consumer portfolio segment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Finance receivables and loans, net | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Interests retained in financial asset sales |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Retained interest, fair value | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 1 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 2 |
Fair value, measurements, recurring | Fair value, inputs, level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 28,398 | 28,220
Derivative assets | 0 | 62
Assets, fair value | 28,398 | 28,282
Derivative liabilities | 0 | (5)
Liabilities, fair value | 0 | 5
Fair value, measurements, recurring | Fair value, inputs, level 2 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities |  | (5)
Fair value, measurements, recurring | Fair value, inputs, level 2 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities | 0 |
Fair value, measurements, recurring | Fair value, inputs, level 2 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 2 | US Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 1
Fair value, measurements, recurring | Fair value, inputs, level 2 | US States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 908 | 639
Fair value, measurements, recurring | Fair value, inputs, level 2 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 147 | 171
Fair value, measurements, recurring | Fair value, inputs, level 2 | Agency mortgage-backed | Residential Mortgage |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 19,884 | 21,404
Fair value, measurements, recurring | Fair value, inputs, level 2 | Agency mortgage-backed | Commercial Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 1,786 | 1,382
Fair value, measurements, recurring | Fair value, inputs, level 2 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 3,425 | 2,850
Fair value, measurements, recurring | Fair value, inputs, level 2 | Mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 38 | 42
Fair value, measurements, recurring | Fair value, inputs, level 2 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 356 | 368
Fair value, measurements, recurring | Fair value, inputs, level 2 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 1,854 | 1,363
Fair value, measurements, recurring | Fair value, inputs, level 2 | Loans held-for-sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage loans held-for-sale, fair value | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 2 | Finance receivables and loans, net | Consumer portfolio segment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Finance receivables and loans, net | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 2 | Interests retained in financial asset sales |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Retained interest, fair value | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 2 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 0 | 62
Fair value, measurements, recurring | Fair value, inputs, level 2 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 0 |
Fair value, measurements, recurring | Fair value, inputs, level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 5 | 2
Derivative assets | 12 | 2
Assets, fair value | 122 | 55
Derivative liabilities | 0 | 0
Liabilities, fair value | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities |  | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative liabilities | 0 |
Fair value, measurements, recurring | Fair value, inputs, level 3 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 5 | 8
Fair value, measurements, recurring | Fair value, inputs, level 3 | US Treasury |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | US States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 5 | 2
Fair value, measurements, recurring | Fair value, inputs, level 3 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Agency mortgage-backed | Residential Mortgage |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Agency mortgage-backed | Commercial Loan |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Fair value, inputs, level 3 | Loans held-for-sale |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Mortgage loans held-for-sale, fair value | 91 | 30
Fair value, measurements, recurring | Fair value, inputs, level 3 | Finance receivables and loans, net | Consumer portfolio segment |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Finance receivables and loans, net | 8 | 11
Fair value, measurements, recurring | Fair value, inputs, level 3 | Interests retained in financial asset sales |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Retained interest, fair value | 1 | 2
Fair value, measurements, recurring | Fair value, inputs, level 3 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | 12 | $ 2
Fair value, measurements, recurring | Fair value, inputs, level 3 | Other Contract [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative assets | $ 0 |

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 + Details
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