v3.26.1
Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Current Assets:    
Allowance for uncollectible accounts $ 13 $ 13
Allowance for obsolescence 137 124
Noncurrent Assets:    
Accumulated depreciation and amortization 25,898 24,719
Accumulated amortization $ 932 $ 928
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) 666,381,636 659,669,346
Treasury stock, at cost (shares) 8,758,606 6,498,109