v3.25.4
Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Current Assets:    
Allowance for uncollectible accounts $ 13 $ 18
Allowance for obsolescence 124 120
Noncurrent Assets:    
Accumulated depreciation and amortization 24,719 23,228
Accumulated amortization $ 928 $ 919
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) 659,669,346 654,571,606
Treasury stock, at cost (shares) 6,498,109 8,098,971