XML 95 R70.htm IDEA: XBRL DOCUMENT v3.10.0.1
Derivative and Hedging Instruments - Additional Information (Detail) - CAD ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about hedges [Line Items]    
Notional amount $ 414,734,000,000 $ 336,773,000,000
Fair value of reinsurance ceded guaranteed minimum income benefits 1,148,000,000 1,079,000,000
Fair value of reinsurance assumed guaranteed minimum income benefits 114,000,000 100,000,000
Fair value of credit and interest rate embedded derivatives 53,000,000 123,000,000
Shareholders' accumulated other comprehensive income (loss) ("AOCI") [Member]    
Disclosure of detailed information about hedges [Line Items]    
Net loss that will be reclassified from AOCI to net income within next 12 months $ 31,000,000  
Maximum time frame for which variable cash flows are hedged 18 years  
Variable annuity guarantee dynamic hedging and macro equity risk hedging programs [Member]    
Disclosure of detailed information about hedges [Line Items]    
Notional amount $ 136,000,000,000 $ 114,000,000,000