Quarterly report pursuant to Section 13 or 15(d)

VIEs - Low Income Housing Tax Credit Partnership (Details)

v3.10.0.1
VIEs - Low Income Housing Tax Credit Partnership (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Low Income Housing Tax Credit Partnerships          
Variable Interest Entity [Line Items]          
Affordable housing tax credit investments $ 1,102   $ 1,102   $ 996
Less: amortization (419)   (419)   (360)
Net affordable housing tax credit investments 683   683   636
Unfunded commitments 345   345   $ 335
Tax credits and other tax benefits recognized 24 $ 22 70 $ 68  
Proportional Amortization Method          
Variable Interest Entity [Line Items]          
Tax credit amortization expense included in provision for income taxes $ 19 $ 17 $ 59 $ 51