XML 39 R27.htm IDEA: XBRL DOCUMENT v3.20.2
Business, Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)
$ in Millions
9 Months Ended
Sep. 30, 2020
USD ($)
Segment
Jun. 30, 2020
USD ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2018
USD ($)
Number of Reportable Segments | Segment 3          
Retained Earnings (Accumulated Deficit) $ (511)   $ (585)      
Accumulated other comprehensive income (loss) $ 5,381 $ 4,965 3,240 $ 3,567 $ 2,702 $ 716
Cumulative Effect, Adjustment            
Retained Earnings (Accumulated Deficit)     (14)      
Accumulated other comprehensive income (loss)     $ 3