Segments - Pre-Tax Income Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Pre-tax income from continuing operations
Amortization of acquired intangible assets	$ (472)	$ (169)	$ (945)	$ (343)
Acquisition-related (charges)/income	(1)	(102)	(2)	(141)
Non-operating retirement-related (costs)/income	(273)	(136)	(538)	(274)
Other - divested businesses	(22)	561	3	505
Income from continuing operations before income taxes	1,571	2,768	1,522	4,651
Business Segments
Pre-tax income from continuing operations
Income from continuing operations before income taxes	2,744	2,832	3,747	5,276
Internal transactions
Pre-tax income from continuing operations
Income from continuing operations before income taxes	(121)	(60)	(176)	(149)
Unallocated corporate amounts
Pre-tax income from continuing operations
Income from continuing operations before income taxes	$ (283)	$ (156)	$ (568)	$ (224)

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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+ Details