Subsequent events (Narrative) (Details)	1 Months Ended				12 Months Ended
	Aug. 23, 2019 USD ($) shares	Aug. 23, 2019 CAD ($) shares	Feb. 14, 2018 USD ($) shares	Feb. 14, 2018 CAD ($) shares	May 31, 2019 USD ($) shares	May 31, 2019 CAD ($) shares	May 31, 2018 USD ($)	May 31, 2018 CAD ($)
Proceeds from Issuance of Private Placement | $					$ 60,862		$ 66,328
Proceeds from issuance of common stock | $					$ 25,997		174,742
Private Placement - 1 [Member]
Stock Issued During Period, Shares, New Issues			5,000,000	5,000,000	6,800,000	6,800,000
Proceeds from Issuance of Private Placement			$ 25,000		$ 25,997	$ 34,000
Private Placement - 2 [Member]
Stock Issued During Period, Shares, New Issues			33,200,000	33,200,000	170,000,000	170,000,000
Proceeds from Issuance of Private Placement			$ 130,833	$ 166,000			$ 66,328	$ 85,000
Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues					19,333,334	19,333,334
Proceeds from issuance of common stock | $					$ 43,500
Subsequent Event [Member] | Private Placement - 1 [Member]
Stock Issued During Period, Shares, New Issues	16,200,000	16,200,000
Proceeds from Issuance of Private Placement	$ 60,862	$ 81,000
Subsequent Event [Member] | Private Placement - 2 [Member]
Stock Issued During Period, Shares, New Issues	5,000,000	5,000,000
Proceeds from Issuance of Private Placement	$ 12,390	$ 16,500
Subsequent Event [Member] | Shares Issued To Settle Accounts Payable [Member]
Stock Issued During Period, Shares, New Issues	1,500,000	1,500,000
Stock issued during period, value, to settle accounts payable	$ 4,878	$ 6,500