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Segments - Pre-Tax Income Reconciliation (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Pre-tax income from continuing operations    
Amortization of acquired intangible assets $ (392) $ (461)
Acquisition-related (charges)/income (3) (7)
Non-operating retirement-related (costs)/income 5 (202)
Kyndryl-related impacts   (222)
Workforce rebalancing charges (259)  
Other - divested businesses (4) (52)
Income from continuing operations before income taxes 1,058 623
Business Segments    
Pre-tax income from continuing operations    
Workforce rebalancing charges   (5)
Income from continuing operations before income taxes 1,863 1,766
Unallocated corporate amounts    
Pre-tax income from continuing operations    
Income from continuing operations before income taxes $ (151) $ (199)