Loan Sale and Servicing Activities and Variable Interest Entities (Non-Consolidated VIEs) (Details) - Variable Interest Entity, Primary Beneficiary - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
PNC Risk of Loss	$ 12,807	$ 11,086
Carrying Value of Assets Owned by PNC	12,739	11,046
Carrying Value of Liabilities Owned by PNC	858	823
Mortgage-Backed Securitizations
PNC Risk of Loss	9,738	8,003
Carrying Value of Assets Owned by PNC	9,738	8,003
Tax Credit Investments And Other
PNC Risk of Loss	3,069	3,083
Carrying Value of Assets Owned by PNC	3,001	3,043
Carrying Value of Liabilities Owned by PNC	$ 858	$ 823

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5728-111685

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=77990344&loc=d3e5747-111685

+ Details

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- Definition

Carrying amount of the assets in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

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- Definition

Carrying amount of the liabilities in the reporting entity's statement of financial position that relate to the reporting entity's variable interest in the Variable Interest Entity (VIE), where the reporting entity is not the VIE's primary beneficiary.

+ References

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- Details

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- Details

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