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Taxes on Income - Temporary Differences (Details) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Deferred tax assets: |  |
Legal and regulatory settlements | $ 27 | $ 23
Employee compensation | 50 | 78
Accrued expenses | 47 | 87
Postretirement benefits | 34 | 105
Unearned revenue | 26 | 33
Allowance for doubtful accounts | 8 | 11
Loss carryforwards | 135 | 112
Other | 45 | 3
Total deferred tax assets | 372 | 452
Deferred tax liabilities: |  |
Goodwill and intangible assets | (249) | (320)
Fixed assets | (4) | (3)
Other | 0 | 0
Total deferred tax liabilities | (253) | (323)
Net deferred income tax asset before valuation allowance | 119 | 129
Valuation allowance | (127) | (116)
Net deferred income tax (liability) asset | (8) |
Net deferred income tax (liability) asset |  | 13
Reported as: |  |
Non-current deferred tax assets | 59 |
Non-current deferred tax assets |  | 61
Non-current deferred tax liabilities | (67) |
Non-current deferred tax liabilities |  | (48)
Net deferred income tax (liability) asset | $ (8) |
Net deferred income tax (liability) asset |  | $ 13

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