Income Taxes [Line Items]

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Number of Tax Jurisdictions

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

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- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
Income Taxes (Narrative) (Details) $ in Millions	Dec. 31, 2021 USD ($) jurisdiction	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Income Taxes [Line Items]
Cumulative net tax benefit reversal	$ 14,701	$ 7,813	$ 5,282
Net tax credit carryforwards	5,000
Total unrecognized tax benefits	5,158	3,837	3,377	$ 4,652
Total unrecognized tax benefits that, if recognized, would affect our effective tax rate	3,700	2,600	2,300
Uncertain tax positions, accrued interest and penalties	$ 270	$ 222
Number of tax jurisdictions \| jurisdiction	2
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 2,000
Cost Sharing Arrangement, Income Tax Expense
Income Taxes [Line Items]
Cumulative net tax benefit reversal			$ 418
Federal
Income Taxes [Line Items]
Net operating loss carryforwards	5,600
State
Income Taxes [Line Items]
Net operating loss carryforwards	4,600
Net tax credit carryforwards	700
Foreign Tax Authority
Income Taxes [Line Items]
Net operating loss carryforwards	$ 1,700