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Segments - Pre-Tax Income Reconciliation (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Pre-tax income from continuing operations        
Amortization of acquired intangible assets $ (475) $ (459) $ (1,389) $ (1,404)
Acquisition-related (charges)/income (4) (1) (37) (3)
Non-operating retirement-related (costs)/income (328) (291) (998) (829)
Separation-related charges (277)   (513)  
Other - divested businesses (10) (20) (34) (17)
Income from continuing operations before income taxes 1,319 1,827 3,776 3,348
Business Segments        
Pre-tax income from continuing operations        
Income from continuing operations before income taxes 2,644 2,962 7,659 6,708
Internal transactions        
Pre-tax income from continuing operations        
Income from continuing operations before income taxes (57) (158) (269) (334)
Unallocated corporate amounts        
Pre-tax income from continuing operations        
Income from continuing operations before income taxes $ (175) $ (206) $ (643) $ (773)