Quarterly report pursuant to Section 13 or 15(d)

OTHER COMPREHENSIVE INCOME OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details)

v3.19.2
OTHER COMPREHENSIVE INCOME OTHER COMPREHENSIVE INCOME - AOCI Roll Forward (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2017
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Balance, beginning of period $ 11,432 $ 11,102 $ 11,308 $ 11,102 $ 10,814  
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets     1   1  
Other comprehensive income before reclassifications 174   (56) 324 (218)  
Amounts reclassified from accumulated OCI to earnings 8   4 12 17  
Period change 182   (52) 336 (201)  
Balance, end of period 11,668 11,432 11,472 11,668 11,472  
Unrealized gains and (losses) on debt securities | Debt Securities            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Balance, beginning of period (217) (363) (428) (363) (278)  
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets           $ (1)
Other comprehensive income before reclassifications 127   (56) 270 (218)  
Amounts reclassified from accumulated OCI to earnings 7   3 10 15  
Period change 134   (53) 280 (203)  
Balance, end of period (83) (217) (482) (83) (482)  
AOCI, Derivative Qualifying as Hedge, Excluded Component, Parent [Member] | Equity Securities [Member]            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Balance, beginning of period 7 0   0    
Other comprehensive income before reclassifications 47     54    
Amounts reclassified from accumulated OCI to earnings 0     0    
Period change 47     54    
Balance, end of period 54 7   54    
Unrealized gains (losses) for pension and other post- retirement obligations            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Balance, beginning of period (245) (246) (249) (246) (250)  
Other comprehensive income before reclassifications 0   0 0 0  
Amounts reclassified from accumulated OCI to earnings 1   1 2 2  
Period change 1   1 2 2  
Balance, end of period (244) (245) (248) (244) (248)  
Accumulated Other Comprehensive Loss            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Balance, beginning of period (455) (609) (677) (609) (528)  
Balance, end of period $ (273) (455) $ (730) (273) (730)  
Reclassification out of Accumulated Other Comprehensive Income            
AOCI Attributable to Parent, Net of Tax [Roll Forward]            
Net unrealized loss on securities transfer   $ (134)   $ (131) $ (144)