Annual report pursuant to Section 13 and 15(d)

Income Taxes (Deferred tax assets and liabilities) (Details)

v3.20.4
Income Taxes (Deferred tax assets and liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred Tax Assets, Gross [Abstract]    
Accrued liabilities and deferred revenues $ 74 $ 97
Tax credits 8 6
Provision for doubtful accounts 9 17
Net operating loss carryforward 25 18
Other comprehensive income and other 22 20
Valuation allowance (26) (19)
Deferred income tax assets 112 139
Deferred income tax liabilities:    
Depreciation and amortization 446 508
Other 16 15
Deferred income tax liabilities 462 523
Deferred Tax Liabilities, Net 350 384
Foreign tax credits 8  
Net Operating Loss Carryforward    
Deferred Tax Assets, Gross [Abstract]    
Valuation allowance (16) (14)
Deferred Tax Asset    
Deferred Tax Assets, Gross [Abstract]    
Valuation allowance (3) (3)
Foreign Tax Credit    
Deferred Tax Assets, Gross [Abstract]    
Valuation allowance (7) (2)
Other non-current assets    
Deferred income tax liabilities:    
Deferred Tax Liabilities, Net 9 3
Deferred income taxes    
Deferred income tax liabilities:    
Deferred Tax Liabilities, Net $ 359 $ 387