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Separation of Kyndryl - Cash flows (Details) - Managed infrastructure services unit - Disposed by separation - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Divestitures    
Net cash provided by/(used in) operating activities   $ 1,465
Net cash provided by/(used in) investing activities $ 48 $ (321)