Income Taxes - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Effective tax rate	45.60%	29.10%	48.50%	(51.40%)
Impairment of goodwill, acquired intangibles and other assets			$ 76	$ 340
Non-deductible goodwill			57	318
Impairment of intangible assets, indefinite-lived (excluding goodwill)			19
Deferred income taxes			6	8
Income tax expense	$ 41	$ 32	63	56
Goodwill, tax deductible amount		$ 22		$ 22
Marketing Applications
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense	$ 22		$ 22