Taxes on Income - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Legal and regulatory settlements	$ 2	$ 2
Employee compensation	58	57
Accrued expenses	30	36
Postretirement benefits	27	48
Unearned revenue	28	29
Allowance for doubtful accounts	9	8
Loss carryforwards	155	155
Other	24	24
Total deferred tax assets	333	359
Deferred tax liabilities:
Goodwill and intangible assets	(318)	(295)
Total deferred tax liabilities	(318)	(295)
Net deferred income tax asset before valuation allowance	15	64
Valuation allowance	(163)	(156)
Net deferred income tax (liability) asset	(148)	(92)
Reported as:
Non-current deferred tax assets	52	52
Non-current deferred tax liabilities	(200)	(144)
Net deferred income tax (liability) asset	$ (148)	$ (92)