Taxes on Earnings (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Taxes on Earnings
Reduction to the transition tax related to the Tax Cut and Jobs Act (TCJA)		$ 78
Excess tax benefits from share based compensation	$ 47	$ 65
Minimum
Taxes on Earnings
Decrease reasonably possible in gross unrecognized tax benefits	230
Maximum
Taxes on Earnings
Decrease reasonably possible in gross unrecognized tax benefits	520
Discontinued operations
Taxes on Earnings
Net tax benefits primarily as a result of the resolution of various tax positions related to prior years	$ 20

Amount of income tax expense (benefit) from transition tax to Tax Cuts and Jobs Act of 2017.

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Line items represent taxes on earnings concepts included in a table.

+ References

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

+ References

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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