Accounting changes (Policies)	6 Months Ended
Jun. 30, 2020
Accounting changes	Effective January 1, 2020, Imperial adopted the Financial Accounting Standards Board’s update, Financial Instruments—Credit Losses (Topic 326) , as amended. The standard requires a valuation allowance for credit losses be recognized for certain financial assets that reflects the current expected credit loss over the asset’s contractual life. The valuation allowance considers the risk of loss, even if remote and considers past events, current conditions and expectations of the future. The standard did not have a material impact on the company’s financial statements.

Accounting changes (Policies)

6 Months Ended

Jun. 30, 2020

Effective January 1, 2020, Imperial adopted the Financial Accounting Standards Board’s update,

Financial Instruments—Credit Losses (Topic 326)

, as amended. The standard requires a valuation allowance for credit losses be recognized for certain financial assets that reflects the current expected credit loss over the asset’s contractual life. The valuation allowance considers the risk of loss, even if remote and considers past events, current conditions and expectations of the future. The standard did not have a material impact on the company’s financial statements.