Securities - Aggregate Fair Value of Investments with Continuous Unrealized Loss Position (Detail) - USD ($)
|
Jun. 30, 2017 |
Dec. 31, 2016 |
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
$ 57,701,000,000
|
$ 60,585,000,000
|
Less than 12 months Unrealized losses |
623,000,000
|
860,000,000
|
12 months or more Fair value |
6,108,000,000
|
4,229,000,000
|
12 months or more Unrealized losses |
234,000,000
|
274,000,000
|
Total Fair value |
63,809,000,000
|
64,814,000,000
|
Total Unrealized losses |
857,000,000
|
1,134,000,000
|
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, greater than 12 months |
168,000,000
|
190,000,000
|
AOCI, transfers from AFS to HTM Securities, gross unrealized losses, less than 12 months |
0
|
0
|
Securities available-for-sale |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
28,990,000,000
|
32,802,000,000
|
Less than 12 months Unrealized losses |
354,000,000
|
506,000,000
|
12 months or more Fair value |
5,793,000,000
|
3,952,000,000
|
12 months or more Unrealized losses |
227,000,000
|
265,000,000
|
Total Fair value |
34,783,000,000
|
36,754,000,000
|
Total Unrealized losses |
581,000,000
|
771,000,000
|
Securities available-for-sale | U.S. Treasury |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
8,023,000,000
|
8,489,000,000
|
Less than 12 months Unrealized losses |
123,000,000
|
181,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
1,000,000
|
0
|
Total Fair value |
8,023,000,000
|
8,489,000,000
|
Total Unrealized losses |
124,000,000
|
181,000,000
|
Securities available-for-sale | U.S. government agencies |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
286,000,000
|
257,000,000
|
Less than 12 months Unrealized losses |
5,000,000
|
9,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
286,000,000
|
257,000,000
|
Total Unrealized losses |
5,000,000
|
9,000,000
|
Securities available-for-sale | State and political subdivisions |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
589,000,000
|
1,058,000,000
|
Less than 12 months Unrealized losses |
12,000,000
|
33,000,000
|
12 months or more Fair value |
129,000,000
|
131,000,000
|
12 months or more Unrealized losses |
18,000,000
|
19,000,000
|
Total Fair value |
718,000,000
|
1,189,000,000
|
Total Unrealized losses |
30,000,000
|
52,000,000
|
Securities available-for-sale | Agency RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
10,592,000,000
|
14,766,000,000
|
Less than 12 months Unrealized losses |
98,000,000
|
141,000,000
|
12 months or more Fair value |
4,376,000,000
|
1,673,000,000
|
12 months or more Unrealized losses |
184,000,000
|
200,000,000
|
Total Fair value |
14,968,000,000
|
16,439,000,000
|
Total Unrealized losses |
282,000,000
|
341,000,000
|
Securities available-for-sale | Non-agency RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
4,000,000
|
21,000,000
|
Less than 12 months Unrealized losses |
0
|
0
|
12 months or more Fair value |
279,000,000
|
332,000,000
|
12 months or more Unrealized losses |
6,000,000
|
13,000,000
|
Total Fair value |
283,000,000
|
353,000,000
|
Total Unrealized losses |
6,000,000
|
13,000,000
|
Securities available-for-sale | Other RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
0
|
26,000,000
|
Less than 12 months Unrealized losses |
0
|
0
|
12 months or more Fair value |
95,000,000
|
136,000,000
|
12 months or more Unrealized losses |
6,000,000
|
8,000,000
|
Total Fair value |
95,000,000
|
162,000,000
|
Total Unrealized losses |
6,000,000
|
8,000,000
|
Securities available-for-sale | Commercial MBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
249,000,000
|
302,000,000
|
Less than 12 months Unrealized losses |
5,000,000
|
7,000,000
|
12 months or more Fair value |
81,000,000
|
163,000,000
|
12 months or more Unrealized losses |
2,000,000
|
4,000,000
|
Total Fair value |
330,000,000
|
465,000,000
|
Total Unrealized losses |
7,000,000
|
11,000,000
|
Securities available-for-sale | Agency commercial MBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
3,422,000,000
|
3,570,000,000
|
Less than 12 months Unrealized losses |
55,000,000
|
78,000,000
|
12 months or more Fair value |
540,000,000
|
589,000,000
|
12 months or more Unrealized losses |
7,000,000
|
6,000,000
|
Total Fair value |
3,962,000,000
|
4,159,000,000
|
Total Unrealized losses |
62,000,000
|
84,000,000
|
Securities available-for-sale | CLOs |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
679,000,000
|
443,000,000
|
Less than 12 months Unrealized losses |
3,000,000
|
1,000,000
|
12 months or more Fair value |
25,000,000
|
404,000,000
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
704,000,000
|
847,000,000
|
Total Unrealized losses |
3,000,000
|
1,000,000
|
Securities available-for-sale | Other asset-backed securities |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
174,000,000
|
276,000,000
|
Less than 12 months Unrealized losses |
0
|
1,000,000
|
12 months or more Fair value |
147,000,000
|
357,000,000
|
12 months or more Unrealized losses |
1,000,000
|
5,000,000
|
Total Fair value |
321,000,000
|
633,000,000
|
Total Unrealized losses |
1,000,000
|
6,000,000
|
Securities available-for-sale | Corporate bonds |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
491,000,000
|
594,000,000
|
Less than 12 months Unrealized losses |
11,000,000
|
16,000,000
|
12 months or more Fair value |
8,000,000
|
7,000,000
|
12 months or more Unrealized losses |
0
|
1,000,000
|
Total Fair value |
499,000,000
|
601,000,000
|
Total Unrealized losses |
11,000,000
|
17,000,000
|
Securities available-for-sale | Sovereign debt/sovereign guaranteed |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
2,107,000,000
|
1,521,000,000
|
Less than 12 months Unrealized losses |
23,000,000
|
20,000,000
|
12 months or more Fair value |
58,000,000
|
63,000,000
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
2,165,000,000
|
1,584,000,000
|
Total Unrealized losses |
23,000,000
|
20,000,000
|
Securities available-for-sale | Non-agency RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
5,000,000
|
25,000,000
|
Less than 12 months Unrealized losses |
0
|
0
|
12 months or more Fair value |
30,000,000
|
47,000,000
|
12 months or more Unrealized losses |
2,000,000
|
9,000,000
|
Total Fair value |
35,000,000
|
72,000,000
|
Total Unrealized losses |
2,000,000
|
9,000,000
|
Securities available-for-sale | Other debt securities |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
1,226,000,000
|
742,000,000
|
Less than 12 months Unrealized losses |
10,000,000
|
10,000,000
|
12 months or more Fair value |
25,000,000
|
50,000,000
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
1,251,000,000
|
792,000,000
|
Total Unrealized losses |
10,000,000
|
10,000,000
|
Securities available-for-sale | Foreign covered bonds |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
1,143,000,000
|
712,000,000
|
Less than 12 months Unrealized losses |
9,000,000
|
9,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
1,143,000,000
|
712,000,000
|
Total Unrealized losses |
9,000,000
|
9,000,000
|
Held-to-maturity |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
28,711,000,000
|
27,783,000,000
|
Less than 12 months Unrealized losses |
269,000,000
|
354,000,000
|
12 months or more Fair value |
315,000,000
|
277,000,000
|
12 months or more Unrealized losses |
7,000,000
|
9,000,000
|
Total Fair value |
29,026,000,000
|
28,060,000,000
|
Total Unrealized losses |
276,000,000
|
363,000,000
|
Held-to-maturity | U.S. Treasury |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
7,533,000,000
|
6,112,000,000
|
Less than 12 months Unrealized losses |
31,000,000
|
41,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
7,533,000,000
|
6,112,000,000
|
Total Unrealized losses |
31,000,000
|
41,000,000
|
Held-to-maturity | U.S. government agencies |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
1,558,000,000
|
1,533,000,000
|
Less than 12 months Unrealized losses |
7,000,000
|
6,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
1,558,000,000
|
1,533,000,000
|
Total Unrealized losses |
7,000,000
|
6,000,000
|
Held-to-maturity | State and political subdivisions |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
|
0
|
Less than 12 months Unrealized losses |
|
0
|
12 months or more Fair value |
|
4,000,000
|
12 months or more Unrealized losses |
|
1,000,000
|
Total Fair value |
|
4,000,000
|
Total Unrealized losses |
0
|
1,000,000
|
Held-to-maturity | Agency RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
19,045,000,000
|
19,498,000,000
|
Less than 12 months Unrealized losses |
225,000,000
|
297,000,000
|
12 months or more Fair value |
163,000,000
|
102,000,000
|
12 months or more Unrealized losses |
3,000,000
|
2,000,000
|
Total Fair value |
19,208,000,000
|
19,600,000,000
|
Total Unrealized losses |
228,000,000
|
299,000,000
|
Held-to-maturity | Non-agency RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
3,000,000
|
4,000,000
|
Less than 12 months Unrealized losses |
0
|
0
|
12 months or more Fair value |
41,000,000
|
48,000,000
|
12 months or more Unrealized losses |
2,000,000
|
2,000,000
|
Total Fair value |
44,000,000
|
52,000,000
|
Total Unrealized losses |
2,000,000
|
2,000,000
|
Held-to-maturity | Other RMBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
0
|
15,000,000
|
Less than 12 months Unrealized losses |
0
|
0
|
12 months or more Fair value |
111,000,000
|
123,000,000
|
12 months or more Unrealized losses |
2,000,000
|
4,000,000
|
Total Fair value |
111,000,000
|
138,000,000
|
Total Unrealized losses |
2,000,000
|
4,000,000
|
Held-to-maturity | Commercial MBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Total Unrealized losses |
0
|
0
|
Held-to-maturity | Agency commercial MBS |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Less than 12 months Fair value |
572,000,000
|
621,000,000
|
Less than 12 months Unrealized losses |
6,000,000
|
10,000,000
|
12 months or more Fair value |
0
|
0
|
12 months or more Unrealized losses |
0
|
0
|
Total Fair value |
572,000,000
|
621,000,000
|
Total Unrealized losses |
6,000,000
|
10,000,000
|
Held-to-maturity | Sovereign debt/sovereign guaranteed |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Total Unrealized losses |
0
|
0
|
Held-to-maturity | Other debt securities |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Total Unrealized losses |
0
|
0
|
Held-to-maturity | Foreign covered bonds |
|
|
Investments, Unrealized Loss Position [Line Items] |
|
|
Total Unrealized losses |
$ 0
|
$ 0
|