XML 108 R80.htm IDEA: XBRL DOCUMENT v3.8.0.1
Recent Accounting Pronouncements and Changes To Accounting Policies - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
Designated financial liabilities at fair value through profit or loss [abstract]  
Gain from fair value transferred from other comprehensive income to reclassified to financial assets $ 49.4
Gain (loss) on fair value transferred from other comprehensive income to retained earnings $ 1.0