The exercise price of outstanding share options.

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The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions]

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The amount of liabilities arising from share-based payment transactions. Share-based payment transactions are transactions in which the entity: (a) receives goods or services from the supplier of those goods or services (including an employee) in a share-based payment arrangement; or (b) incurs an obligation to settle the transaction with the supplier in a share-based payment arrangement when another group entity receives those goods or services. [Refer: Share-based payment arrangements [member]]

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The number of other equity instruments (ie other than share options) forfeited in a share-based payment arrangement.

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The number of share options outstanding in a share-based payment arrangement.

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The number of share options exercisable in a share-based payment arrangement.

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The number of share options granted in a share-based payment arrangement.

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The number of shares issued by the entity.

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The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]]

+ References

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The weighted average exercise price of share options exercised in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average exercise price of share options outstanding in a share-based payment arrangement. [Refer: Weighted average [member]]

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The weighted average remaining contractual life of outstanding share options. [Refer: Weighted average [member]]

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Accrued and Paid Expense From Cash-Settled Share-Based Payment Transactions

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No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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The number of share options vested in a share-based payment arrangement.

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No definition available.

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The number of vested share options outstanding in a share-based payment arrangement.

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No definition available.

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The number of vested share options exercised in a share-based payment arrangement.

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No definition available.

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The number of vested share options vested in a share-based payment arrangement.

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No definition available.

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The weighted average exercise price of share options vested in a share-based payment arrangement.

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No definition available.

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- Definition

The weighted average fair value at the measurement date of equity instruments other than share options forfeited and cancelled during the period.

+ References

No definition available.

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The weighted average fair value at the measurement date of equity instruments other than share options granted during the period.

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No definition available.

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Share-based compensation - Schedule of share option awards (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) shares $ / shares	Dec. 31, 2021 USD ($) shares $ / shares	Dec. 31, 2021 $ / shares $ / shares shares	Dec. 31, 2020 USD ($) shares $ / shares	Dec. 31, 2020 USD ($) shares $ / shares
Share option awards, Weighted average exercise price
Liabilities from share-based payment transactions \| $	$ 0			$ 22	$ 22
Share option awards - US$ denominated
Share option awards, Non-vested
Outstanding, beginning of year (in shares)	1,084,185	654,633		4,476,658	4,476,658
Granted (in shares)		579,949
Vested (in shares)	(293,860)	(150,397)		3,822,025	3,822,025
Forfeited (in shares)	(209,610)
Outstanding, end of year (in shares)	580,715	1,084,185		654,633	654,633
Share option awards, Vested
Outstanding, beginning of year (in shares)	2,096,582	3,267,423
Vested (in shares)	293,860	150,397		3,822,025	3,822,025
Exercised (in shares)	(293,860)	(1,321,238)		554,602	554,602
Outstanding, end of year (in shares)	2,096,582	2,096,582		3,267,423	3,267,423
Exercisable, end of year (in shares)	2,096,582
Share option awards, Weighted average exercise price
Outstanding, beginning of year (in dollars per share) \| $ / shares	$ 10.74	$ 6.94		$ 6.91
Vested (in dollars per share) \| $ / shares	8.46	5.78		6.21
Exercised (in dollars per share) \| $ / shares	8.46	5.74		6.21
Forfeited (in USD and CDN dollars per share) \| $ / shares	6.59
Outstanding, end of year (in dollars per share) \| $ / shares	11.31	10.74		$ 6.94
Grant-date-fair-value of awarded units (in dollars per share) \| $ / shares		$ 25.00
Exercisable, end of year (in dollars per share) \| $ / shares	$ 7.45
Share option awards - Canadian $ denominated
Share option awards, Vested
Outstanding, beginning of year (in shares)		242,244		242,244	242,244
Exercised (in shares)		(242,244)
Outstanding, end of year (in shares)				242,244	242,244
Share option awards, Weighted average exercise price
Outstanding, beginning of year (in dollars per share) \| $ / shares			$ 4.75		$ 4.75
Exercised (in dollars per share) \| $ / shares			$ 4.75
Outstanding, end of year (in dollars per share) \| $ / shares					$ 4.75
Share Options and Phantom Share Options \| Share-based Payment, Tranche One
Share option awards, Vested
Exercised (in shares)	(159,354)	(715,884)
Share option awards, Weighted average exercise price
Shares issued (in shares)	65,859	382,367	382,367
Share Options and Phantom Share Options \| Share-based Payment, Tranche Two
Share option awards, Vested
Exercised (in shares)	(134,506)	(847,598)
Share option awards, Weighted average exercise price
Exercised (in dollars per share) \| $ / shares	$ 23.75	$ 31.23
Expense from cash-settled share-based payment transactions \| $	$ 2	$ 22
Accrued and paid expense \| $		$ 5
Share Option Awards Tranche A
Share option awards, Non-vested
Outstanding, beginning of year (in shares)	2,600,818
Outstanding, end of year (in shares)	2,223,121	2,600,818
Share option awards, Weighted average exercise price
Weighted average remaining contractual life	4 years 2 months 12 days	5 years 7 months 6 days
Share Option Awards Tranche A \| Minimum
Share option awards, Weighted average exercise price
Exercise price (in dollars per share) \| $ / shares	$ 4.87	$ 4.87	$ 4.87
Share Option Awards Tranche A \| Maximum
Share option awards, Weighted average exercise price
Exercise price (in dollars per share) \| $ / shares	$ 8.95	$ 8.95	8.95
Share Option Awards Tranche B
Share option awards, Non-vested
Outstanding, beginning of year (in shares)	579,949
Outstanding, end of year (in shares)	454,176	579,949
Share option awards, Weighted average exercise price
Exercise price (in dollars per share) \| $ / shares	$ 25.00	$ 25	$ 25
Weighted average remaining contractual life	8 years 2 months 12 days	9 years 2 months 12 days