Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Fair Value and Carrying Value of Financial Assets and Liabilities (Parenthetical) (Detail)

v3.7.0.1
Fair Value Measurements - Summary of Fair Value and Carrying Value of Financial Assets and Liabilities (Parenthetical) (Detail) - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Fair Value Disclosures [Abstract]    
Amortized cost $ 127 $ 61