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Earnings (loss) per share (Tables)
 12 Months Ended
Dec. 31, 2024
Earnings per share [abstract]  
Schedule of the reconciliations of the denominators of the basic and diluted per share computations
Years Ended December 31
(millions, except earnings per share)
202420232022
Net (loss) income
$(61)$54 $183 
Weighted average number of equity shares outstanding275 274 266 
Basic (loss) earnings per share
$(0.22)$0.20 $0.69 
Years Ended December 31
(millions, except earnings per share)		202420232022
Net (loss) income
$(61)$54 $183 
After-tax impact of provisions for written put options
(41)(3)— 
Fully diluted net (loss) income
$(102)$51 $183 
Weighted average number of equity shares outstanding275 274 266 
Dilutive effect of share-based compensation— 3 4 
Dilutive effect of provisions for written put options
22 9 — 
Weighted average number of diluted equity shares outstanding297 286 270 
Diluted (loss) earnings per share
$(0.34)$0.18 $0.68