Annual report pursuant to Section 13 and 15(d)

INCOME TAXES - Effective Income Tax Rate Reconciliation (Details)

v3.10.0.1
INCOME TAXES - Effective Income Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Tax Disclosure [Abstract]                      
Provision for income taxes computed at the statutory rate                 $ 342 $ 488 $ 322
Increases (decreases):                      
Tax-exempt income                 (23) (31) (27)
Tax-exempt bank owned life insurance income                 (14) (23) (20)
General business credits                 (80) (71) (64)
Impact from TCJA                 (60) (67) (46)
Effective Income Tax Rate Reconciliation, Impact om TCJA, Amount                 (3) (123) 0
Affordable housing investment amortization, net of tax benefits                 64 46 37
State deferred tax asset valuation allowance adjustment, net                 10 11 5
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount                 (14) (13) (4)
Other                 13 (9) 5
Provision for income taxes $ 57 $ 62 $ 57 $ 59 $ (20) $ 90 $ 79 $ 59 $ 235 $ 208 $ 208