Taxes on Earnings (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Taxes on Earnings
Net benefit on remeasurement of deferred tax assets and liabilities	$ 78
Excess tax benefits from share based compensation	90	$ 71
Cumulative net tax expense for the impact of Tax cuts and jobs act	1,510
Provisional transition tax		16
Minimum
Taxes on Earnings
Decrease reasonably possible in gross unrecognized tax benefits	185
Maximum
Taxes on Earnings
Decrease reasonably possible in gross unrecognized tax benefits	$ 430
Discontinued operations
Taxes on Earnings
Tax expense (benefit) from resolution of various tax positions related to prior years		(24)
Decrease in gross unrecognized tax benefits		$ (31)

The cumulative amount of income tax expense (benefit) from effect of Tax Cuts and Jobs Act of 2017.

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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.

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

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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 the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit).

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Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act.

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Amount of increase (decrease) in unrecognized tax benefits attributable to uncertain tax positions taken in tax returns.

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