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Parent Company (Income Statement) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Operating Revenues [Abstract] |  |  |
Noninterest Income, Other Operating Income | $ 1,473 | $ 1,205 | $ 1,077
Operating Expenses [Abstract] |  |  |
Income from continuing operations before income taxes and noncontrolling interests | 5,492 | 5,486 | 4,413
Income tax benefits | 901 | 928 | (185)
Net income from continuing operations | 4,591 | 4,558 | 4,598
Income from discontinued operations before income taxes and noncontrolling interests | 988 | 942 | 1,077
Income taxes | 161 | 154 | 287
Net income from discontinued operations | 827 | 788 | 790
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 5,418 | 5,346 | 5,388
Other comprehensive income (loss), after tax and net of reclassifications into Net income | 1,524 | (583) | 117
Comprehensive income attributable to PNC | 6,893 | 4,718 | 5,455
Parent Company |  |  |
Operating Revenues [Abstract] |  |  |
Interest income | 169 | 147 | 109
Noninterest Income, Other Operating Income | 48 | (1) | 37
Total operating revenue | 3,957 | 2,942 | 3,448
Operating Expenses [Abstract] |  |  |
Interest expense | 325 | 281 | 215
Other Expenses | 146 | 139 | 175
Total operating expense | 471 | 420 | 390
Income before income taxes and equity in undistributed net income of subsidiaries | 3,486 | 2,522 | 3,058
Equity In Undistributed Net Income Of Subsidiaries | 1,363 | 2,307 | 1,974
Income from continuing operations before income taxes and noncontrolling interests | 4,321 | 4,305 | 4,209
Income tax benefits | (221) | (208) | (339)
Net income from continuing operations | 4,542 | 4,513 | 4,548
Income from discontinued operations before income taxes and noncontrolling interests | 988 | 942 | 1,077
Income taxes | 161 | 154 | 287
Net income from discontinued operations | 827 | 788 | 790
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest | 5,369 | 5,301 | 5,338
Net pension and other postretirement benefit plan activity arising during the period. | (2) | 1 | 1
Other comprehensive income (loss), after tax and net of reclassifications into Net income | (2) | 1 | 1
Comprehensive income attributable to PNC | 5,367 | 5,302 | 5,339
Parent Company | Bank Subsidiaries And Bank Holding Company |  |  |
Operating Revenues [Abstract] |  |  |
Dividends from | 3,570 | 2,639 | 2,926
Operating Expenses [Abstract] |  |  |
Equity In Undistributed Net Income Of Subsidiaries | 671 | 1,602 | 1,249
Parent Company | Non Bank Subsidiaries |  |  |
Operating Revenues [Abstract] |  |  |
Dividends from | 170 | 157 | 376
Operating Expenses [Abstract] |  |  |
Equity In Undistributed Net Income Of Subsidiaries | 164 | 181 | (98)
Discontinued Operations |  |  |
Operating Expenses [Abstract] |  |  |
Other comprehensive income (loss), after tax and net of reclassifications into Net income | 4 | (43) | 35
Discontinued Operations | Parent Company | Bank Subsidiaries And Bank Holding Company |  |  |
Operating Expenses [Abstract] |  |  |
Equity In Undistributed Net Income Of Subsidiaries | 528 | 524 | 725
Dividends | $ 460 | $ 418 | $ 352

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