v3.19.3.a.u2
Debt Securities (Schedule Of Amortized Cost, Gross Unrealized Gains And Losses, And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost $ 22,332 $ 23,258
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 344 38
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] (70) (567)
Available-for-sale debt securities, net carrying value 22,606 22,729
Debt securities available for sale 22,606 22,729
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 1,361 1,517
Held To Maturity Debt Securities Gross Unrealized Gains [1] 0 0
Held To Maturity Debt Securities Gross Unrealized Losses [1] (29) (35)
Debt Securities held to maturity 1,332 1,482
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 42 1
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss (2) (23)
Debt Securities held to maturity, estimated fair value 1,372 1,460
US Treasury Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 180 284
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 2 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] 0 (4)
Available-for-sale debt securities, net carrying value 182 280
Debt securities available for sale 182 280
Federal agency securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 42 43
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 1 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] 0 0
Available-for-sale debt securities, net carrying value 43 43
Debt securities available for sale 43 43
Residential Agency [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 15,336 17,064
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 218 26
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] (38) (466)
Available-for-sale debt securities, net carrying value 15,516 16,624
Debt securities available for sale 15,516 16,624
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 736 883
Held To Maturity Debt Securities Gross Unrealized Gains [1] 0 0
Held To Maturity Debt Securities Gross Unrealized Losses [1] (26) (32)
Debt Securities held to maturity 710 851
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 22 1
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss 0 (10)
Debt Securities held to maturity, estimated fair value 732 842
Residential Non-Agency [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 1 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] 0 0
Available-for-sale debt securities, net carrying value 1 2
Debt securities available for sale 1 2
Commercial Agency [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 4,720 3,891
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 77 8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] (31) (64)
Available-for-sale debt securities, net carrying value 4,766 3,835
Debt securities available for sale 4,766 3,835
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 625 634
Held To Maturity Debt Securities Gross Unrealized Gains [1] 0 0
Held To Maturity Debt Securities Gross Unrealized Losses [1] (3) (3)
Debt Securities held to maturity 622 631
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 20 0
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss (2) (13)
Debt Securities held to maturity, estimated fair value 640 618
Commercial Non Agency [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 639 768
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 8 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] 0 (10)
Available-for-sale debt securities, net carrying value 647 760
Debt securities available for sale 647 760
Corporate and other debt securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities, Available-for-sale, Amortized Cost 1,414 1,206
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax [1] 38 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax [1] (1) (23)
Available-for-sale debt securities, net carrying value 1,451 1,185
Debt securities available for sale $ 1,451 $ 1,185
[1]
The gross unrealized losses recognized in OCI on securities held to maturity resulted from a transfer of securities available for sale to held to maturity in the second quarter of 2013.