Fair Value Measurements (Fair Value Measurements Using Significant Unobservable Inputs) (Details) - Recurring - Level 3 - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
12 Months Ended |
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
$ 376
|
$ 542
|
$ 402
|
$ 545
|
$ 545
|
$ 505
|
$ 809
|
| Total unrealized gains/(losses) recorded in earnings |
(47)
|
10
|
(94)
|
(20)
|
(48)
|
(68)
|
98
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
1
|
0
|
4
|
42
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
1
|
| Purchases / Originations |
64
|
77
|
121
|
146
|
260
|
372
|
792
|
| Sales |
0
|
(49)
|
(24)
|
(71)
|
(176)
|
(231)
|
(1,099)
|
| Settlement |
(10)
|
(22)
|
(22)
|
(43)
|
(179)
|
(41)
|
(138)
|
| Transfers In (Out) |
|
|
|
|
0
|
4
|
0
|
| Balance at End of Year |
383
|
558
|
383
|
558
|
402
|
545
|
505
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
10
|
(51)
|
48
|
| Liabilities, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
(152)
|
(84)
|
(166)
|
(166)
|
(199)
|
(19)
|
| Total unrealized gains/(losses) recorded in earnings |
|
2
|
|
2
|
(2)
|
11
|
(74)
|
| Total realized gains/(losses) recorded in earnings |
|
1
|
|
3
|
(3)
|
(7)
|
(6)
|
| Total unrealized gains/(losses) recorded in OCI |
|
0
|
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
|
0
|
|
0
|
0
|
0
|
(120)
|
| Sales |
|
24
|
|
24
|
52
|
0
|
0
|
| Settlement |
|
11
|
|
27
|
35
|
29
|
20
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
|
(120)
|
|
(120)
|
(84)
|
(166)
|
(199)
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
(2)
|
11
|
(74)
|
| Rate lock commitments |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
61
|
55
|
26
|
31
|
31
|
10
|
86
|
| Total unrealized gains/(losses) recorded in earnings |
58
|
(30)
|
120
|
7
|
60
|
154
|
0
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
0
|
0
|
0
|
(150)
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
106
|
93
|
187
|
191
|
330
|
273
|
377
|
| Sales |
(126)
|
(75)
|
(220)
|
(172)
|
(342)
|
(353)
|
(241)
|
| Settlement |
(16)
|
(13)
|
(30)
|
(27)
|
(53)
|
(53)
|
(62)
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
83
|
30
|
83
|
30
|
26
|
31
|
10
|
| Long-term debt |
|
|
|
|
|
|
|
| Liabilities, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
(70)
|
0
|
(84)
|
(84)
|
(106)
|
0
|
| Total unrealized gains/(losses) recorded in earnings |
|
0
|
|
0
|
0
|
0
|
0
|
| Total realized gains/(losses) recorded in earnings |
|
1
|
|
3
|
(3)
|
(7)
|
(6)
|
| Total unrealized gains/(losses) recorded in OCI |
|
0
|
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
|
0
|
|
0
|
0
|
0
|
(120)
|
| Sales |
|
24
|
|
24
|
52
|
0
|
0
|
| Settlement |
|
11
|
|
27
|
35
|
29
|
20
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
|
(36)
|
|
(36)
|
0
|
(84)
|
(106)
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
0
|
0
|
0
|
| DOJ litigation settlement |
|
|
|
|
|
|
|
| Liabilities, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
(84)
|
(82)
|
(84)
|
(82)
|
(82)
|
(93)
|
(19)
|
| Total unrealized gains/(losses) recorded in earnings |
0
|
2
|
0
|
2
|
(2)
|
11
|
(74)
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Sales |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Settlement |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
(84)
|
(84)
|
(84)
|
(84)
|
(84)
|
(82)
|
(93)
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
(2)
|
11
|
(74)
|
| Rate lock commitments |
|
|
|
|
|
|
|
| Liabilities, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
32
|
34
|
(18)
|
| Municipal obligation |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
|
0
|
2
|
2
|
0
|
|
| Total unrealized gains/(losses) recorded in earnings |
|
|
|
0
|
0
|
0
|
|
| Total realized gains/(losses) recorded in earnings |
|
|
|
0
|
0
|
0
|
|
| Total unrealized gains/(losses) recorded in OCI |
|
|
|
0
|
0
|
0
|
|
| Purchases / Originations |
|
|
|
0
|
0
|
0
|
|
| Sales |
|
|
|
0
|
0
|
0
|
|
| Settlement |
|
|
|
(2)
|
(2)
|
(2)
|
|
| Transfers In (Out) |
|
|
|
|
0
|
4
|
|
| Balance at End of Year |
|
0
|
|
0
|
0
|
2
|
0
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
0
|
0
|
|
| Second mortgage |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
40
|
50
|
42
|
53
|
53
|
65
|
0
|
| Total unrealized gains/(losses) recorded in earnings |
0
|
2
|
1
|
2
|
2
|
2
|
1
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
1
|
1
|
2
|
(6)
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
0
|
0
|
0
|
0
|
0
|
0
|
80
|
| Sales |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Settlement |
(2)
|
(4)
|
(5)
|
(8)
|
(14)
|
(16)
|
(10)
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
38
|
48
|
38
|
48
|
42
|
53
|
65
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
2
|
2
|
14
|
| HELOC |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
55
|
113
|
64
|
132
|
132
|
155
|
0
|
| Total unrealized gains/(losses) recorded in earnings |
(3)
|
(2)
|
(3)
|
(6)
|
(4)
|
(3)
|
(8)
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
0
|
(1)
|
2
|
11
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
0
|
0
|
0
|
0
|
0
|
1
|
171
|
| Sales |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Settlement |
(8)
|
(18)
|
(17)
|
(33)
|
(63)
|
(23)
|
(19)
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
44
|
93
|
44
|
93
|
64
|
132
|
155
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
5
|
(26)
|
15
|
| Mortgage servicing rights |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
281
|
279
|
296
|
258
|
258
|
285
|
711
|
| Total unrealized gains/(losses) recorded in earnings |
(44)
|
10
|
(92)
|
(16)
|
(46)
|
(67)
|
105
|
| Total realized gains/(losses) recorded in earnings |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Total unrealized gains/(losses) recorded in OCI |
0
|
0
|
0
|
0
|
0
|
0
|
0
|
| Purchases / Originations |
64
|
77
|
121
|
146
|
260
|
271
|
541
|
| Sales |
0
|
(49)
|
(24)
|
(71)
|
(176)
|
(231)
|
(973)
|
| Settlement |
0
|
0
|
0
|
0
|
0
|
0
|
(99)
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
0
|
| Balance at End of Year |
$ 301
|
317
|
301
|
317
|
296
|
258
|
285
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
3
|
(27)
|
19
|
| Other investments |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
100
|
$ 0
|
100
|
100
|
0
|
|
| Total unrealized gains/(losses) recorded in earnings |
|
0
|
|
0
|
0
|
0
|
|
| Total realized gains/(losses) recorded in earnings |
|
0
|
|
0
|
0
|
0
|
|
| Total unrealized gains/(losses) recorded in OCI |
|
0
|
|
0
|
0
|
0
|
|
| Purchases / Originations |
|
0
|
|
0
|
0
|
100
|
|
| Sales |
|
0
|
|
0
|
0
|
0
|
|
| Settlement |
|
0
|
|
0
|
(100)
|
0
|
|
| Transfers In (Out) |
|
|
|
|
0
|
0
|
|
| Balance at End of Year |
|
$ 100
|
|
$ 100
|
0
|
100
|
0
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
$ 0
|
0
|
|
| Mortgage securitization |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
|
|
|
|
0
|
91
|
| Total unrealized gains/(losses) recorded in earnings |
|
|
|
|
|
|
0
|
| Total realized gains/(losses) recorded in earnings |
|
|
|
|
|
|
(9)
|
| Total unrealized gains/(losses) recorded in OCI |
|
|
|
|
|
|
1
|
| Purchases / Originations |
|
|
|
|
|
|
0
|
| Sales |
|
|
|
|
|
|
(73)
|
| Settlement |
|
|
|
|
|
|
(10)
|
| Transfers In (Out) |
|
|
|
|
|
|
0
|
| Balance at End of Year |
|
|
|
|
|
|
0
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
|
|
0
|
| Transferors' interest |
|
|
|
|
|
|
|
| Assets, Unobservable Input Reconciliation [Roll Forward] |
|
|
|
|
|
|
|
| Balance at Beginning of Year |
|
|
|
|
|
$ 0
|
7
|
| Total unrealized gains/(losses) recorded in earnings |
|
|
|
|
|
|
0
|
| Total realized gains/(losses) recorded in earnings |
|
|
|
|
|
|
46
|
| Total unrealized gains/(losses) recorded in OCI |
|
|
|
|
|
|
0
|
| Purchases / Originations |
|
|
|
|
|
|
0
|
| Sales |
|
|
|
|
|
|
(53)
|
| Settlement |
|
|
|
|
|
|
0
|
| Transfers In (Out) |
|
|
|
|
|
|
0
|
| Balance at End of Year |
|
|
|
|
|
|
0
|
| Changes In Unrealized Held at End of Year |
|
|
|
|
|
|
$ 0
|