CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, shares authorized	Unlimited	Unlimited
Common stock, par value	$ 0	$ 0
Common stock, shares issued	137,000,000.0	140,500,000
Common stock, shares outstanding	137,000,000	140,500,000
First preferred stock, shares authorized	Unlimited	Unlimited
Second preferred stock, shares authorized	Unlimited	Unlimited
First preferred stock, shares outstanding	0	0
Second preferred stock, shares outstanding	0	0