Derivative Financial Instruments (Master Netting Schedule) (Details) - USD ($)
$ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Derivative Asset [Abstract] |
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
$ 24
|
$ 14
|
| Derivative Liability [Abstract] |
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
84
|
41
|
| Central Counterparty Clearing House |
|
|
| Derivative Liability [Abstract] |
|
|
| Additional funds pledged |
56
|
7
|
| Derivatives designated as hedging instruments | Interest rate swaps on FHLB advances |
|
|
| Derivative Asset [Abstract] |
|
|
| Gross Amount |
3
|
|
| Gross Amounts Netted in the Statement of Financial Position |
3
|
|
| Net Amount Presented in the Statement of Financial Position |
0
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
0
|
|
| Derivative Liability [Abstract] |
|
|
| Gross Amount |
55
|
4
|
| Gross Amounts Netted in the Statement of Financial Position |
3
|
0
|
| Net Amount Presented in the Statement of Financial Position |
52
|
4
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
34
|
19
|
| Derivatives not designated as hedging instruments |
|
|
| Derivative Asset [Abstract] |
|
|
| Gross Amount |
56
|
32
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
56
|
32
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
24
|
14
|
| Derivative Liability [Abstract] |
|
|
| Gross Amount |
41
|
14
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
41
|
14
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
50
|
22
|
| Derivatives not designated as hedging instruments | U.S. Treasury, swap and euro dollar futures |
|
|
| Derivative Asset [Abstract] |
|
|
| Gross Amount |
1
|
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
|
| Net Amount Presented in the Statement of Financial Position |
1
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
0
|
|
| Derivative Liability [Abstract] |
|
|
| Gross Amount |
0
|
1
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
0
|
1
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
2
|
2
|
| Derivatives not designated as hedging instruments | Mortgage backed securities forwards |
|
|
| Derivative Asset [Abstract] |
|
|
| Gross Amount |
2
|
7
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
2
|
7
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
0
|
4
|
| Derivative Liability [Abstract] |
|
|
| Gross Amount |
24
|
6
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
24
|
6
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
41
|
8
|
| Derivatives not designated as hedging instruments | Interest rate swaps and swaptions |
|
|
| Derivative Asset [Abstract] |
|
|
| Gross Amount |
53
|
25
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
53
|
25
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
24
|
10
|
| Derivative Liability [Abstract] |
|
|
| Gross Amount |
17
|
7
|
| Gross Amounts Netted in the Statement of Financial Position |
0
|
0
|
| Net Amount Presented in the Statement of Financial Position |
17
|
7
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Financial Instruments |
0
|
0
|
| Gross Amounts Not Offset in the Statement of Financial Condition, Cash Collateral |
$ 7
|
$ 12
|