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Investment Securities Investment Securities (Gross Unrealized Loss and Fair Value of Securities Available for Sale Without an Allowance for Credit Losses) (Details) $ in Millions | Jun. 30, 2020 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | $ (95)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 5,513
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (37)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 1,188
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (132)
Debt securities, available-for-sale, unrealized loss position | 6,701
Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Agency [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | (7)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 2,124
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (3)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 249
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (10)
Debt securities, available-for-sale, unrealized loss position | 2,373
Residential Mortgage-backed Securities [Member] | Mortgage-backed Securities Non-agency [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | (8)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 213
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (6)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 81
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (14)
Debt securities, available-for-sale, unrealized loss position | 294
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Agency [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (3)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 136
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (3)
Debt securities, available-for-sale, unrealized loss position | 136
Commercial Mortgage Backed Securities [Member] | Mortgage-backed Securities Non-agency [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | (61)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 2,107
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (2)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 71
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (63)
Debt securities, available-for-sale, unrealized loss position | 2,178
Asset backed [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | (18)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 969
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (22)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 616
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (40)
Debt securities, available-for-sale, unrealized loss position | 1,585
Other [Member] |
Debt Securities, Available-for-sale [Line Items] |
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months, accumulated loss | (1)
Debt securities, available-for-sale, continuous unrealized loss position, less than 12 months - fair value | 100
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer, accumulated loss | (1)
Debt securities, available-for-sale, continuous unrealized loss position, 12 months or longer - fair value | 35
Debt securities, available-for-sale, unrealized loss position, accumulated loss | (2)
Debt securities, available-for-sale, unrealized loss position | $ 135

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- Definition Debt Securities With No Allowance For Credit Loss, Available-for-Sale, Unrealized Loss Position, Accumulated Loss + References No definition available. + Details
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