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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Lease, Cost
The following table shows the components of lease cost (in millions):
Lease CostYears ended December 31,
20212020
Operating lease cost$428 $451 
Finance lease cost:
     Amortization of right-of-use assets27 38 
     Interest on lease liabilities10 21 
Short-term lease cost32 24 
      Total lease cost$497 $534 
Supplemental cash flow information related to leases was as follows (in millions):
Cash FlowYears ended December 31,
20212020
Cash paid for amounts included in the measurement of lease obligations:
     Operating cash flows for operating leases$428 $504 
     Operating cash flows for finance leases$14 $22 
     Financing cash flows for finance leases$186 $48 
Right-of-use assets obtained in exchange for lease obligations:
     Operating leases$35 $27 

Other information related to leases was as follows:
Other InformationDecember 31, 2021December 31,
2020
Weighted-average remaining lease term (in years):
     Operating leases77.3
     Finance leases5.83.5
Weighted-average discount rate:
     Operating leases3.6 %3.7 %
     Finance leases6.0 %6.4 %
Assets and Liabilities
Supplemental balance sheet information related to leases was as follows (in millions):
Operating LeasesDecember 31, 2021December 31, 2020
Operating lease right-of-use assets$1,592 $1,928 
Accounts payable and other current liabilities$328 $391 
Operating lease liabilities1,015 1,286 
      Total operating lease liabilities$1,343 $1,677 

Finance LeasesDecember 31, 2021December 31, 2020
Property and equipment$425 $804 
Accumulated depreciation(227)(386)
      Property and equipment, net$198 $418 
Long-term debt due within one year$29 $186 
Long-term debt110 139 
      Total finance lease liabilities$139 $325 
Finance Lease, Liability, Maturity
Maturities of lease liabilities as of December 31, 2021 are summarized as follows (in millions):
Operating LeasesFinance Leases
2022$353 $36 
2023314 28 
2024265 24 
2025180 23 
202673 23 
Thereafter341 30 
      Total lease payments1,526 164 
Less amount representing interest(183)(25)
      Total$1,343 $139 
Lessee, Operating Lease, Liability, Maturity
Maturities of lease liabilities as of December 31, 2021 are summarized as follows (in millions):
Operating LeasesFinance Leases
2022$353 $36 
2023314 28 
2024265 24 
2025180 23 
202673 23 
Thereafter341 30 
      Total lease payments1,526 164 
Less amount representing interest(183)(25)
      Total$1,343 $139