Undiscounted amount of the accrual for environmental loss contingencies.

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Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of another entity's patents that the entity has allegedly infringed.

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Number of pending claims pertaining to a loss contingency.

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Disputes, Litigation and Contingencies (Details) $ in Millions	Jul. 31, 2015 patent	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2010 claim
Loss Contingencies [Line Items]
Shareholder derivative actions filed \| claim				3
Loss Contingency, Patents Allegedly Infringed, Number \| patent	7
Estimated litigation liability		$ 43	$ 44
Accrual for Environmental Loss Contingencies, Gross		$ 6