Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of Basic And Diluted Loss Per Share

The following table sets forth the computation of basic and diluted loss per share for the years ended December 31, 2021, 2020 and 2019.

(U.S. dollars in millions, except per share amounts)	Year Ended December 31
	2021		2020		2019
Numerator:
Basic and diluted:
Net loss attributable to common shareholders	$	(385)	$	(545)	$	(500)
Denominator:
Basic: Weighted average number of shares outstanding (in millions)	111.88		111.56		101.62
Diluted: Weighted-average number of shares outstanding, assuming dilution (in millions)	111.88		111.56		101.62
Basic loss per share	$	(3.44)	$	(4.89)	$	(4.92)
Diluted loss per share	$	(3.44)	$	(4.89)	$	(4.92)

Equity Incentive Awards And Convertible Shares

The table below shows equity incentive awards and convertible shares due to the Notes excluded from the diluted loss per share calculations because their effect would be antidilutive:

(Share amounts)	Year Ended December 31
	2021	2020	2019
Equity incentive awards	719,178	817,733	287,326
Convertible shares due to the Notes	9,277,305	9,277,305	5,515,548