v3.20.2
Income Taxes​ (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
points
Sep. 30, 2019
USD ($)
points
Income Tax Disclosure [Abstract]        
Effective income tax rate, including discrete items 66.70% (242.90%) 11.70% 80.00%
Effective Income Tax Rate Reconciliation, Percentage Points | points     9.3 59.0
Income Tax Expense (Benefit)        
Provision for depreciation and amortization $ 2 $ (5) $ (5) $ 45
Impact of change in estimated annual effective tax rate on previous quarter’s pretax income 51 22 0 0
Interim period treatment of operational losses in foreign jurisdictions for which no tax benefit is recognized* $ (48) $ 0 $ 1 $ 0
Other discrete items 5 0 9 1
Provision for income taxes (H) $ 10 $ 17 $ 5 $ 46