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Basis of Presentation - Additional Information (Detail) $ in Millions	Dec. 31, 2015 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Amount recast to reduce Other assets and Long-term debt as a result of adopting ASU 2015-03, Simplifying the Presentation of Debt Issuance Costs	$ 38

Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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