Taxes on Income - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation of beginning and ending amount of unrecognized tax benefits
Balance at beginning of year	$ 147	$ 212	$ 221
Additions based on tax positions related to the current year	21	19	23
Additions for tax positions of prior years	11	2	17
Reduction for tax positions of prior years	(15)	(21)	(32)
Reduction for settlements	(33)	(65)	(5)
Expiration of applicable statutes of limitations	(7)	0	(12)
Balance at end of year	$ 124	$ 147	$ 212

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

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-Publisher FASB
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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