Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Detail)

v3.3.0.814
Fair Value Measurements - Schedule of Cash Deposits Subject to Credit Risk (Detail) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]    
Cash Deposits (including restricted cash) $ 45 $ 70
Amount of Cash Deposits in excess of amounts federally insured $ 42 $ 66