Fair Value Measurement - Recurring Fair Value Measurements (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021 |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | $ 4,677 | | $ 5,283 |
Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Total | [1] | 4,726 | | 5,332 |
Business Combination, Contingent Consideration, Liability | | 10 | [1] | 14 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | [1] | 10 | | 14 |
Assets measured at fair value, Other | | 49 | [1] | 49 |
Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Total | | 15 | | 15 |
Business Combination, Contingent Consideration, Liability | | 0 | | 0 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 0 | | 0 |
Assets measured at fair value, Other | | 15 | | 15 |
Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Total | | 4,658 | | 5,256 |
Business Combination, Contingent Consideration, Liability | | 0 | | 0 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 0 | | 0 |
Assets measured at fair value, Other | | 0 | | 0 |
Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Total | | 53 | | 61 |
Business Combination, Contingent Consideration, Liability | | 10 | | 14 |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 10 | | 14 |
Assets measured at fair value, Other | | 34 | | 34 |
U.S. government and federal agency | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 2,336 | | 2,220 |
U.S. government and federal agency | Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [1] | 2,336 | | 2,220 |
U.S. government and federal agency | Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
U.S. government and federal agency | Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 2,336 | | 2,220 |
U.S. government and federal agency | Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
State and municipal | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 11 | | 13 |
State and municipal | Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [1] | 11 | | 13 |
State and municipal | Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
State and municipal | Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
State and municipal | Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 11 | | 13 |
Residential mortgage-backed | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [2] | 539 | | 606 |
Residential mortgage-backed | Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [1] | 539 | | 606 |
Residential mortgage-backed | Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Residential mortgage-backed | Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 539 | | 606 |
Residential mortgage-backed | Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Asset-backed | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [3] | 1,783 | | 2,430 |
Asset-backed | Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | [1] | 1,783 | | 2,430 |
Asset-backed | Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Asset-backed | Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 1,783 | | 2,430 |
Asset-backed | Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Other Debt Obligations | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 8 | | 14 |
Other Debt Obligations | Fair Value, Measurements, Recurring | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 8 | | 14 |
Other Debt Obligations | Fair Value, Measurements, Recurring | Level 1 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Other Debt Obligations | Fair Value, Measurements, Recurring | Level 2 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | 0 | | 0 |
Other Debt Obligations | Fair Value, Measurements, Recurring | Level 3 | | | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | | | |
Debt securities (Note 3) | | $ 8 | | $ 14 |
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[1] | For the three months ended March 31, 2022 and 2021, there were no fair value measurements transferred between levels. | |
[2] | All of our residential mortgage-backed securities have been issued by government-sponsored entities and are collateralized by U.S. mortgages. At March 31, 2022 and December 31, 2021, $129 million and $145 million of residential mortgage-backed securities, respectively, are pledged by the Bank as collateral to the Federal Reserve to secure Federal Reserve Discount Window advances. | |
[3] | Our asset-backed securities are collateralized by credit card and auto loans. | |