v3.22.2.2
Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2022
Dec. 31, 2021
Current Assets:    
Allowance for uncollectible accounts $ 24 $ 50
Allowance for obsolescence 150 176
Noncurrent Assets:    
Accumulated depreciation and amortization 19,984 18,671
Accumulated amortization $ 900 $ 893
Stockholders' Equity:    
Common stock, par value (USD per share) $ 0.0001 $ 0.0001
Common stock, authorized (shares) 1,500,000,000 1,500,000,000
Common stock, issued (shares) 651,719,217 649,720,387
Treasury stock, at cost (shares) 10,530,855 9,752,872