Annual report pursuant to Section 13 and 15(d)

Leases - Lease Cost and Supplemental Information (Details)

v3.20.4
Leases - Lease Cost and Supplemental Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Leases [Abstract]    
Right-of-use asset $ 10,000 $ 9,735
Lease liabilities $ 10,474 $ 10,093
Weighted-average discount rate used to calculate present value of future minimum lease payments 3.38% 3.68%
Weighted-average lease term (in years) 8 years 4 months 24 days 8 years 2 months 12 days
Operating lease cost $ 2,149 $ 2,085
Variable lease cost 474 498
Total lease cost 2,623 2,583
Right-of-use assets obtained in exchange for new operating lease liabilities 851 931
Operating cash flows from operating leases $ 2,039 $ 2,009
Operating Lease, Liability, Statement of Financial Position [Extensible List] us-gaap:AccruedLiabilitiesAndOtherLiabilities us-gaap:AccruedLiabilitiesAndOtherLiabilities