The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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-Section 50
-Paragraph 2
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Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense related to the intangible assets	$ 65,000,000	$ 67,000,000	$ 55,000,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected amortization for the year 2017	56,000,000
Expected amortization for the year 2018	56,000,000
Expected amortization for the year 2019	56,000,000
Expected amortization for the year 2020	56,000,000
Expected amortization for the year 2021	56,000,000
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Expected amortization for the year 2017	64,000,000
Expected amortization for the year 2018	64,000,000
Expected amortization for the year 2019	64,000,000
Expected amortization for the year 2020	64,000,000
Expected amortization for the year 2021	$ 64,000,000