Recent Accounting Standards - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Accounting Changes And Error Corrections [Abstract]
Debt issuance cost	$ 17	$ 19

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

No definition available.