XML 98 R88.htm IDEA: XBRL DOCUMENT v3.20.2
Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 18, 2020
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Equity Method Investments [Line Items]          
Effective income tax rate   32.50% 20.70% 21.10% 17.90%
Income tax expense, revaluation of net deferred tax liabilities   $ 32      
Tax expense       $ 112  
Unrecognized tax benefits   185   185  
Decrease in unrecognized tax benefits reasonably possible   $ 66   $ 66  
Investment Services Business          
Schedule of Equity Method Investments [Line Items]          
Controlling interest sold (as a percent) 60.00%        
Disposal Group, Disposed of by Sale          
Schedule of Equity Method Investments [Line Items]          
Tax expense $ 112        
Disposal Group, Disposed of by Sale | Investment Services Business          
Schedule of Equity Method Investments [Line Items]          
Pre-tax gain on sale $ 428        
Controlling interest sold (as a percent) 60.00%