XML 144 R78.htm IDEA: XBRL DOCUMENT
v3.20.2

Investment Securities (Narrative) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Schedule of Investments [Line Items] |  |
Net unsettled investment purchases | $ 549 | $ 430
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held | 1,100 |
Federal National Mortgage Association Certificates and Obligations (FNMA) |  |
Schedule of Investments [Line Items] |  |
Amortized cost of debt securities of a single issuer that exceeeds 10 percent of shareholders equity | 40,500 |
Fair value of debt securities of a single issuer that exceeeds 10 percent of shareholders equity | 41,100 |
Federal Home Loan Mortgage Corp (FHLMC) |  |
Schedule of Investments [Line Items] |  |
Amortized cost of debt securities of a single issuer that exceeeds 10 percent of shareholders equity | 7,700 |
Fair value of debt securities of a single issuer that exceeeds 10 percent of shareholders equity | $ 7,700 |

X
- References No definition available. + Details
Name: | pnc_Debtsecuritiesamortizedcostamountofdebtsecuritiesexceeds10percentofshareholdersequity
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | pnc_Debtsecuritiesfairvalueamountofdebtsecuritiesexceeds10percentofstockholdersequity
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Investment Securities, Net Unsettled Investment Purchases + References No definition available. + Details
Name: | pnc_InvestmentSecuritiesNetUnsettledInvestmentPurchases
Namespace Prefix: | pnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118939692&loc=SL6284393-111563 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=118939692&loc=SL6284393-111563 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FederalNationalMortgageAssociationCertificatesAndObligationsFNMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_FederalHomeLoanMortgageCorporationFhlmcInsuredLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |