Significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Useful Lives for Property, Plant and Equipment

A summary of the useful lives used for calculating depreciation and amortization is as follows:

Turbines	25 years
Generators	15 years
Transformers	15 years

December 31, 2023	Cost		Accumulated depreciation		Net book value
Vessels	$	12,072.4	$	(3,028.5)	$	9,043.9
Equipment and other	566.5		(230.8)		335.7
Property, plant and equipment	$	12,638.9	$	(3,259.3)	$	9,379.6

December 31, 2022	Cost		Accumulated depreciation		Net book value
Vessels	$	9,610.7	$	(2,805.6)	$	6,805.1
Equipment and other	542.9		(191.1)		351.8
Property, plant and equipment	$	10,153.6	$	(2,996.7)	$	7,156.9