Annual report pursuant to Section 13 and 15(d)

OTHER COMPREHENSIVE INCOME - Activity/Roll Forward (Details)

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OTHER COMPREHENSIVE INCOME - Activity/Roll Forward (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pretax        
Noncredit-related impairment recoveries (losses) on securities not expected to be sold       $ 4
Change in fair value of cash flow hedging relationships arising during the period       3
Less: Amortization of premiums of floors designated as cash flow hedges included in net income       1
Net change in fair value on cash flow hedges $ 26     4
Net change in pension and post-retirement obligations   $ 7 $ (4) 0
Total other comprehensive income (loss), pretax   448 (106) (52)
Tax (Expense) Benefit        
Noncredit-related impairment recoveries (losses) on securities not expected to be sold       (2)
Change in fair value of the excluded components, net of reclassification to earnings       (1)
Less: Reclassification adjustment for net (gains) losses included in net income       0
Net change in fair value on cash flow hedges (3)     (1)
Net change in pension and other post-retirement obligations   2 0 0
Total other comprehensive income (loss)   (95) 26 18
After-tax        
Noncredit-related impairment recoveries (losses) on securities not expected to be sold       2
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities   335 (84) (39)
Unrealized gains and losses on derivatives used in cash flow hedging relationships arising during the period       2
Less: Reclassification adjustment for net losses (gains) losses included in net income       1
Net change in unrealized gains (losses) on derivatives used in cash flow hedging relationships $ 23 0 0 3
Net change in pension and post-retirement obligations   (5) 4 0
Other comprehensive income (loss), net of tax   353 (80) (34)
Equity Securities [Member]        
Pretax        
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities       1
Tax (Expense) Benefit        
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities       (1)
After-tax        
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities       0
Debt securities        
Pretax        
Unrealized holding gains (losses) on available-for-sale securities arising during the period   403 (151) (87)
Less: Reclassification adjustment for realized net losses (gains) included in net income   26 41 26
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities   429 (110) (57)
Tax (Expense) Benefit        
Unrealized holding gains (losses) on available-for-sale securities arising during the period   (89) 35 31
Less: Reclassification adjustment for realized net losses (gains) included in net income   (5) (9) (9)
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities   (94) 26 20
After-tax        
Unrealized holding gains (losses) on available-for-sale debt securities arising during the period   314 (116) (56)
Less: Reclassification adjustment for net gains (losses) included in net income   21 32 17
Net change in unrealized holding gains (losses) on available-for-sale debt/equity securities   $ 335 $ (84) $ (37)