v3.19.3.a.u2
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Statement of Comprehensive Income [Abstract]      
Net income $ 1,582 $ 1,759 $ 1,263
Unrealized losses on securities transferred to held to maturity:      
Unrealized losses on securities transferred to held to maturity during the period, net of tax 0 0 0
Less: Reclassification Adjustments for Amortization of Unrealized Losses on Securities Transferred to Held to Maturity, Net of Tax (5) (6) (6)
Net change in unrealized losses on securities transferred to held to maturity, net of tax 5 6 6
Unrealized gains (losses) on securities available for sale:      
Unrealized holding gains (losses) arising during the period on securities available for sale, net of tax 581 (244) 0
Less: reclassification adjustments for securities gains (losses) realized in net income (net of tax) (21) 0 12
Net change in unrealized gains (losses) on securities available for sale, net of tax 602 (244) (12)
Unrealized gains (losses) on derivative instruments designated as cash flow hedges:      
Unrealized holding gains (losses) on derivatives arising during the period (net of tax) 367 (3) 2
Less: reclassification adjustments for gains (losses) on derivative instruments realized in net income (net of tax) (18) 9 53
Net change in unrealized gains (losses) on derivative instruments, net of tax 385 (12) (51)
Defined benefit pension plans and other post employment benefits:      
Net actuarial gains (losses) arising during the period (net of tax) (150) 7 (40)
Less: reclassification adjustments for amortization of actuarial loss and settlements realized in net income (net of tax) (32) (28) (31)
Net change from defined benefit pension plans and other post employment benefits, net of tax (118) 35 (9)
Other comprehensive income (loss), net of tax 874 (215) (66)
Comprehensive income $ 2,456 $ 1,544 $ 1,197