Annual report pursuant to Section 13 and 15(d)

Leases - Supplemental Balance Sheet Information (Details)

v3.20.4
Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Operating Leases        
Operating lease right-of-use assets $ 427 $ 466 $ 347 $ 0
Operating lease current liabilities 48 46 30 0
Operating lease liabilities 419 456 $ 339 $ 0
Total operating lease liabilities 467 502    
Finance Leases        
Property and equipment, gross 8 15    
Accumulated depreciation (7) (12)    
Property and equipment, net 1 3    
Current maturities of debt 1 1    
Long-term debt 0 1    
Total finance lease liabilities $ 1 $ 2    
Weighted average remaining lease term, operating leases (years) 9 years 9 years    
Weighted average remaining lease term, finance leases (years) 1 year 2 years    
Weighted average discount rate, operating leases (as a percent) 5.30% 5.30%    
Weighted average discount rate, finance leases (as a percent) 1.70% 1.70%    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization    
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent    
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] us-gaap:LongTermDebtAndCapitalLeaseObligations us-gaap:LongTermDebtAndCapitalLeaseObligations