XML 23 R52.htm IDEA: XBRL DOCUMENT v3.3.0.814
Stockholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Total Accumulated OCI Balance $ 495 $ (203) $ 495 $ (203) $ 4 $ 430 $ 12 $ (1,383)
OCI before reclassifications 467 (253) (14) 1,059        
Amounts reclassified from accumulated OCI 24 38 79 121        
Total Accumulated OCI Balance 63 24 104 104        
Agency Securities [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Beginning OCI Balance 89 225 570 (1,087)        
OCI before reclassifications 428 (239) (39) 1,076        
Amounts reclassified from accumulated OCI 39 (14) 25 (17)        
Ending OCI Balance 556 (28) 556 (28)        
Discontinuation of Election to Account for Interest Rate Swaps as Designated Cash Flow Hedges [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Net Unrealized Gain (Loss) on Swaps 61 (175) 61 (175) $ 85 $ 140 $ 213 $ 296
Interest Rate Swap [Member] | Agency Securities [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
OCI before reclassifications $ 428 $ (239) $ (39) $ 1,076