Quarterly report pursuant to Section 13 or 15(d)

Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Before- and After-tax (Details)

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Accumulated Other Comprehensive Income (Loss) - Changes in OCI Components Before- and After-tax (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Available-for-sale Securities, after Tax        
Net changer, after Tax $ (994) $ (631) $ 2,600 $ (5,770)
Derivatives, before Tax        
Net change in fair value, before Tax     106 (3)
Net realized losses reclassified into earnings, before Tax     521 584
Net change, before Tax     627 581
Derivatives, Tax        
Net change in fair value, Tax     (20) 0
Net realized losses reclassified into earnings, Tax     (196) (216)
Net change, Tax     (216) (216)
Derivatives, after Tax        
Net change in fair value, after Tax     86 (3)
Net realized losses reclassified into earnings, after Tax     325 368
Net change, after Tax 196 180 411 365
Employee benefit plans, before Tax        
Net increase in fair value, before tax     0 2,138
Net realized losses reclassified into earnings, before Tax     37 204
Settlements and curtailments, before Tax     0 46
Net change, before Tax     37 2,388
Employee benefit plans, Tax        
Net increase in fair value, tax     0 (795)
Net realized losses reclassified into earnings, Tax     (14) (68)
Settlements and curtailments, Tax     41 (12)
Net change, Tax     27 (875)
Employee benefit plans, after Tax        
Net increase in fair value, after tax     0 1,343
Net realized losses reclassified into earnings, after Tax     23 136
Settlements and curtailments, after Tax     41 34
Net change, after Tax 8 1,380 64 1,513
Foreign currency, before Tax        
Net increase (decrease) in fair value, before Tax     258 214
Net realized (gains) losses reclassified into earnings, before Tax     (2) 31
Net change, before tax     256 245
Foreign currency, Tax        
Net increase (decrease) in fair value, Tax     (390) (347)
Net realized losses reclassified into earnings, Tax     1 (32)
Net change, Tax     (389) (379)
Foreign currency, after Tax        
Net increase (decrease) in fair value, after Tax     (132) (133)
Net realized losses reclassified into earnings, after Tax     (1) (1)
Net change, after tax (14) (43) (133) (134)
Other comprehensive income (loss), net-of-tax:        
Other Comprehensive Income (Loss), before Tax     5,062 (5,957)
Other Comprehensive Income (Loss), Tax     (2,120) 1,931
Other comprehensive income (loss) (804) 886 2,942 (4,026)
Debt securities
        
Available-for-sale Securities, before Tax        
Net change in fair value, before Tax     5,322 (7,573)
Net realized gains reclassified into earnings, before Tax     (1,179) (861)
Net change, before Tax     4,143 (8,434)
Available-for-sale Securities, Tax        
Net change in fair value, Tax     (1,990) 2,813
Net realized gains reclassified into earnings, Tax     448 318
Net change, Tax     (1,542) 3,131
Available-for-sale Securities, after Tax        
Net change in fair value, after Tax     3,332 (4,760)
Net realized gains reclassified into earnings, after Tax     (731) (543)
Net changer, after Tax     2,601 (5,303)
Equity securities
        
Available-for-sale Securities, before Tax        
Net change in fair value, before Tax     (1) 28
Net realized gains reclassified into earnings, before Tax     0 (765)
Net change, before Tax     (1) (737)
Available-for-sale Securities, Tax        
Net change in fair value, Tax     0 (10)
Net realized gains reclassified into earnings, Tax     0 280
Net change, Tax     0 270
Available-for-sale Securities, after Tax        
Net change in fair value, after Tax     (1) 18
Net realized gains reclassified into earnings, after Tax     0 (485)
Net changer, after Tax     $ (1) $ (467)