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Financial Derivatives (Narrative) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Derivative [Line Items] |  |  |  |
Cash and securities held to collateralize net derivative assets | $ 2,700,000,000 |  | $ 2,700,000,000 |
Cash and securities pledged to collateralize net derivative liabilities | 2,000,000,000.0 |  | 2,000,000,000.0 |
Derivative, net liability position, aggregate fair value | 3,100,000,000 |  | 3,100,000,000 |
Collateral already posted, aggregate fair value | 2,500,000,000 |  | 2,500,000,000 |
Maximum amount of collateral PNC would have been required to post if the credit-risk-related contingent features underlying these agreements had been triggered | 600,000,000 |  | 600,000,000 |
Cash Flow Hedging [Member] | Interest Rate Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Cash flow hedge gain (loss) to be reclassified within twelve months |  |  | 471,000,000 |
Cash flow hedge gain (loss) to be reclassified within twelve months, net of tax |  |  | $ 372,000,000 |
Maximum length of time hedged in cash flow hedge |  |  | 10 years |
Gain (loss) from components excluded from assessment of cash flow hedge effectiveness, net | 0 | $ 0 | $ 0 | $ 0
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net | 0 | 0 | 0 | 0
Fair Value Hedging [Member] | Interest Rate Contracts [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Gain (loss) from components excluded from assessment of fair value hedge effectiveness, net | 0 | 0 | 0 | 0
Net Investment Hedging [Member] | Foreign Exchange Contract [Member] |  |  |  |
Derivative [Line Items] |  |  |  |
Gain loss from components excluded from assessment of net investment hedge effectiveness net | 0 | 0 | 0 | 0
Derivative instruments, gain (loss) reclassified from accumulated oci into income, effective portion, net | $ 5,000,000 | $ 32,000,000 | $ 80,000,000 | $ 14,000,000

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- Definition Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, held under master netting and other collateral agreements to collateralize net derivative assets due from counterparties. + References No definition available. + Details
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- Definition Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, pledged under master netting and other collateral agreements to collateralize net derivative liabilities owed to counterparties. + References No definition available. + Details
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- Definition Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax + References No definition available. + Details
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- Definition Gain Loss From Components Excluded From Assessment Of Net Investment Hedge Effectiveness Net + References No definition available. + Details
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- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959 + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959 + Details
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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624258-113959 + Details
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- Definition The net gain (loss) relating to components of the gain (loss) on the cash flow hedging instrument excluded from the assessment of cash flow hedge effectiveness. Recognized in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition The amount of net gain (loss) reclassified into earnings in the period when cash flow hedge is discontinued because it is probable that the original forecasted transactions will not occur by the end of the original period or an additional two month time period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994 + Details
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- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=112277219&loc=d3e80748-113994 + Details
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