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Recently Completed Divestitures of the Latin American Business and Planned Divestiture of ILEC Businesses - Pre-tax Net Income (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disposal Group, Held-for-sale, Not Discontinued Operations | ILEC Business        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Pre-tax net income $ 164 $ 234 $ 576 $ 528