Fair Value (Fair Value Measurements- Recurring Quantitative Information) (Details) - Fair Value, Measurements, Recurring $ in Millions | 12 Months Ended |
Dec. 31, 2019USD ($) | Dec. 31, 2018USD ($) |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 82,227 | $ 75,744 |
Financial and nonfinancial liabilities, fair value disclosure | (2,674) | (3,355) |
Level 3 | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 5,395 | 6,157 |
Financial and nonfinancial liabilities, fair value disclosure | (344) | (333) |
Recuring Assets, Net of Liabilities - Fair Value | 5,051 | 5,824 |
Assets, fair value disclosure | 5,400 | 6,100 |
Level 3 | Loans - Residential real estate | Discounted Cash Flow | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | 72 | 90 |
Level 3 | Loans - Residential real estate | Consensus Pricing | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 184 | $ 129 |
Level 3 | Loans - Residential real estate | Consensus Pricing | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cumulative default rate | 3.60% | 11.00% |
Level 3 | Loans - Residential real estate | Consensus Pricing | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cumulative default rate | 100.00% | 100.00% |
Level 3 | Loans - Residential real estate | Consensus Pricing | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Cumulative default rate | 76.70% | 81.80% |
Level 3 | Loans - Home equity | Consensus Pricing | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 44 | $ 53 |
Level 3 | Loans - Home equity | Consensus Pricing | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Credit and Liquidity discount | 0.00% | 0.00% |
Level 3 | Loans - Home equity | Consensus Pricing | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Credit and Liquidity discount | 99.00% | 99.00% |
Level 3 | Loans - Home equity | Consensus Pricing | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Credit and Liquidity discount | 63.40% | 61.30% |
Level 3 | Equity investments | Multiple of Adjusted Earnings | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 1,276 | $ 1,255 |
Level 3 | Equity investments | Multiple of Adjusted Earnings | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Multiple of earnings | 5 | 4.5 |
Level 3 | Equity investments | Multiple of Adjusted Earnings | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Multiple of earnings | 16.5 | 16 |
Level 3 | Equity investments | Multiple of Adjusted Earnings | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Multiple of earnings | 8.5 | 8.4 |
Level 3 | Insignificant Assets, Net of Liabilities | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | | $ 35 |
Financial and nonfinancial liabilities, fair value disclosure | $ (38) | |
Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 995 | $ 1,257 |
Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 3.20% | 4.92% |
Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 14.35% | 14.55% |
Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 7.69% | 8.06% |
Commercial Mortgages | Level 3 | Loans Held For Sale | Discounted Cash Flow, Spread Over the Benchmark Curve | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 64 | $ 87 |
Commercial Mortgages | Level 3 | Loans Held For Sale | Discounted Cash Flow | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 5.30% | 5.35% |
Commercial Mortgages | Level 3 | Loans Held For Sale | Discounted Cash Flow | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 23.95% | 19.00% |
Commercial Mortgages | Level 3 | Loans Held For Sale | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 18.89% | 12.17% |
Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 649 | $ 726 |
Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 1,741 | $ 2,128 |
Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 1.88% | 2.16% |
Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Assets, Fair Value Disclosure | $ 240 | $ 274 |
Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Spread over the benchmark curve | 2.15% | 1.98% |
Visa Class B Swap | Level 3 | Financial derivatives | Discounted Cash Flow | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Financial and nonfinancial liabilities, fair value disclosure | $ (176) | $ (210) |
Estimated growth rate of Visa Class A share price | 16.00% | 16.00% |
Estimated length of litigation resolution date | 3/30/2021 | 12/31/2020 |
Visa Class B Swap | Level 3 | Financial derivatives | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Estimated conversion factor of Class B shares into Class A shares | 162.30% | 163.00% |
Measurement Input, Constant Default Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0 | 0 |
Measurement Input, Constant Default Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.141 | 0.188 |
Measurement Input, Constant Default Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.043 | 0.051 |
Measurement Input, Constant Default Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.010 | 0.010 |
Measurement Input, Constant Default Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.072 | 0.185 |
Measurement Input, Constant Default Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.034 | 0.040 |
Measurement Input, Loss Severity | Level 3 | Loans - Residential real estate | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.080 | 0.080 |
Measurement Input, Loss Severity | Level 3 | Loans - Residential real estate | Consensus Pricing | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0 | 0 |
Measurement Input, Loss Severity | Level 3 | Loans - Residential real estate | Consensus Pricing | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 1 | 1 |
Measurement Input, Loss Severity | Level 3 | Loans - Residential real estate | Consensus Pricing | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.145 | 0.172 |
Measurement Input, Loss Severity | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.266 | 0.100 |
Measurement Input, Loss Severity | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.957 | 1 |
Measurement Input, Loss Severity | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.519 | 0.508 |
Measurement Input, Loss Severity | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.300 | 0.150 |
Measurement Input, Loss Severity | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 1 | 1 |
Measurement Input, Loss Severity | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.576 | 0.638 |
Measurement Input, Constant Prepayment Rate | Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0 | 0 |
Measurement Input, Constant Prepayment Rate | Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.538 | 0.545 |
Measurement Input, Constant Prepayment Rate | Residential Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.135 | 0.087 |
Measurement Input, Constant Prepayment Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.035 | 0.046 |
Measurement Input, Constant Prepayment Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.181 | 0.147 |
Measurement Input, Constant Prepayment Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.046 | 0.057 |
Measurement Input, Constant Prepayment Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.010 | 0.010 |
Measurement Input, Constant Prepayment Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.362 | 0.330 |
Measurement Input, Constant Prepayment Rate | Residential mortgage-backed Securities | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.099 | 0.1180 |
Measurement Input, Constant Prepayment Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.010 | 0.010 |
Measurement Input, Constant Prepayment Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.220 | 0.190 |
Measurement Input, Constant Prepayment Rate | Asset backed | Level 3 | Securities available for sale | Priced By A Third Party Vendor Using Discounted Cash Flow Pricing Model | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Debt Securities, Available-for-sale, Measurement Input | 0.075 | 0.085 |
Measurement Input, Discount Rate | Level 3 | Loans - Residential real estate | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.048 | 0.058 |
Measurement Input, Discount Rate | Level 3 | Loans - Residential real estate | Consensus Pricing | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.050 | 0.055 |
Measurement Input, Discount Rate | Level 3 | Loans - Residential real estate | Consensus Pricing | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.080 | 0.083 |
Measurement Input, Discount Rate | Level 3 | Loans - Residential real estate | Consensus Pricing | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Loans, Measurement Input | 0.052 | 0.058 |
Measurement Input, Discount Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Minimum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.056 | 0.069 |
Measurement Input, Discount Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Maximum | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.081 | 0.085 |
Measurement Input, Discount Rate | Commercial Mortgages | Level 3 | Mortgage Servicing Rights | Discounted Cash Flow | Weighted Average | | |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | | |
Servicing asset, measurement input | 0.079 | 0.084 |