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Capital Stock - Narrative (Details)			1 Months Ended	3 Months Ended							9 Months Ended	12 Months Ended
	Dec. 12, 2022 $ / shares	Nov. 04, 2022 $ / shares	Apr. 30, 2022 shares	Sep. 30, 2022 USD ($) vote $ / shares shares	Jun. 30, 2022 $ / shares	Mar. 31, 2022 $ / shares	Dec. 31, 2021 $ / shares shares	Sep. 30, 2021 $ / shares	Jun. 30, 2021 $ / shares	Mar. 31, 2021 $ / shares	Sep. 30, 2022 USD ($) vote $ / shares shares	Dec. 31, 2021 $ / shares shares	May 31, 2022 USD ($)	May 31, 2021 USD ($)
Dividends Payable [Line Items]
Common shares, authorized (in shares) | shares				233,333,000			233,333,000				233,333,000	233,333,000
Number of votes per share | vote				1							1
Maximum percent of individual ownership				9.50%							9.50%
Minimum number of votes per share for other shareholders under 9.5% shareholder provision | vote				1							1
Quarterly cash dividends declared (in dollars per share) | $ / shares				$ 0.22	$ 0.21	$ 0.20	$ 0.19	$ 0.18	$ 0.17	$ 0.16	$ 0.63	$ 0.70
Quarterly cash dividends paid (in dollars per share) | $ / shares				$ 0.22	$ 0.21	$ 0.20	$ 0.19	$ 0.18	$ 0.17	$ 0.16	$ 0.63	$ 0.70
Subsequent event
Dividends Payable [Line Items]
Quarterly cash dividends declared (in dollars per share) | $ / shares		$ 0.23
Forecast
Dividends Payable [Line Items]
Quarterly cash dividends paid (in dollars per share) | $ / shares	$ 0.23
Share Repurchase Plan 2021
Dividends Payable [Line Items]
Share repurchase approved amount | $														$ 250,000,000
Stock repurchased (in shares) | shares			543,399								2,136,961
Shares acquired and cancelled | $											$ 92,200,000
Share Repurchase Plan 2022
Dividends Payable [Line Items]
Share repurchase approved amount | $													$ 250,000,000
Stock repurchased (in shares) | shares											0
Remaining authorized repurchase amount | $				$ 250,000,000							$ 250,000,000

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