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.

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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross carrying value of goodwill	$ 2,200,000,000us-gaap_GoodwillGross
Accumulated goodwill impairment	2,100,000,000
Goodwill impairment charge				2,100,000,000us-gaap_GoodwillImpairmentLoss
Goodwill	86,841,000us-gaap_Goodwill	86,841,000us-gaap_Goodwill
Amortization expense on intangible assets	2,889,000us-gaap_AmortizationOfIntangibleAssets	3,669,000us-gaap_AmortizationOfIntangibleAssets	3,758,000us-gaap_AmortizationOfIntangibleAssets
Trademarks
Finite-Lived Intangible Assets [Line Items]
Asset impairment charges	$ 0	$ 4,400,000