XML 21 R3.htm IDEA: XBRL DOCUMENT v3.20.4
Consolidated Balance Sheet (Parenthetical) - USD ($)
shares in Millions, $ in Millions
Dec. 31, 2020
Dec. 31, 2019
Allowance for doubtful accounts, accounts receivable $ 990 $ 519
Allowance for doubtful accounts, other receivables 1,047 859
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 5,230 4,995
Finite-lived Intangible Assets, Accumulated Amortization $ 5,455 $ 5,072
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 3,000 3,000
Common stock, shares issued 946 948
Common Stock, shares outstanding 946 948
Preferred stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 10 10
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0