Taxes on Income - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Legal and regulatory settlements	$ 23	$ 45
Employee compensation	78	91
Accrued expenses	87	72
Postretirement benefits	105	126
Unearned revenue	33	39
Allowance for doubtful accounts	11	12
Loss carryforwards	112	114
Other	3	18
Total deferred tax assets	452	517
Deferred tax liabilities:
Goodwill and intangible assets	(320)	(299)
Fixed assets	(3)	(9)
Other	0	0
Total deferred tax liabilities	(323)	(308)
Net deferred income tax asset (liability) before valuation allowance	129	209
Valuation allowance	(116)	(98)
Net deferred income tax asset (liability)	13	111
Reported as:
Current deferred tax assets		109
Current deferred tax liabilities		(8)
Non-current deferred tax assets	61
Non-current deferred tax assets		33
Non-current deferred tax liabilities	(48)
Non-current deferred tax liabilities		(23)
Net deferred income tax asset (liability)	$ 13	$ 111