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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($)
shares in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Income Statement [Abstract]    
OPERATING REVENUE $ 3,290 $ 3,738 Close
OPERATING EXPENSES    
Cost of services and products (exclusive of depreciation and amortization) 1,652 1,817
Selling, general and administrative 823 721
Loss on sale of business 22 77
Depreciation and amortization 748 733
Total operating expenses 3,245 3,348 Close
OPERATING INCOME 45 390 Close
OTHER INCOME (EXPENSE)    
Interest expense (291) (279)
Net gain on early retirement of debt (Note 5) 275 609
Other income (expense), net 73 (40)
Total other income, net 57 290 Close
INCOME BEFORE INCOME TAXES 102 680 Close
Income tax expense 45 169 Close
NET INCOME $ 57 $ 511 Close
Earnings Per Share [Abstract]    
BASIC (in dollars per share) $ 0.06 $ 0.52
DILUTED (in dollars per share) $ 0.06 $ 0.52
WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING    
BASIC (in shares) 984,855 981,555
DILUTED (in shares) 986,262 982,283