Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders' Equity Note [Abstract]

Schedule of Stock by Class [Table Text Block]

At December 31, 2021, the Company's issued and outstanding redeemable preferred shares, each with a par value of $1.00 per share, were as follows (in millions of U.S. dollars, except number of shares and percentage amounts):

	Series J
Date of issuance	March 2021
Number of preferred shares outstanding	8,000,000
Annual dividend rate	4.875		%
Underwriting discounts and commissions	$	6.1
Aggregate liquidation value, at $25 per share	$	200.0

At December 31, 2020, the Company's issued and outstanding redeemable preferred shares, each with a par value of $1.00 per share, were as follows (in millions of U.S. dollars, except number of shares and percentage amounts):

	Series G			Series H			Series I			Total
Date of issuance	May 2016			May 2016			May 2016
Number of preferred shares outstanding	6,415,264			11,753,798			7,320,574			25,489,636
Annual dividend rate	6.500		%	7.250		%	5.875		%
Underwriting discounts and commissions (1)	$	5.4		$	9.5		$	6.4		$	21.3
Aggregate liquidation value, at $25 per share	$	160.4		$	293.8		$	183.0		$	637.2

(1)Underwriting discounts and commissions represent the original amounts paid to issue Series D, E and F shares. These amounts were reallocated on a pro-rata basis between the previously issued and the newly issued series G, H and I shares as a result of the share exchange in May 2016 for $nil consideration.