Share-based Payments (Summary of Share Unit Activity) (Details) - $ / shares	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Shares	128,206	253,636
Vested and settled, Shares	(9,272)	(27,816)
Outstanding ending balance, Shares	118,934	225,820
Outstanding beginning balance, Weighted average grant date fair value (per share)	$ 70.19	$ 70.41
Outstanding ending balance, Weighted average grant date fair value (per share)	$ 70.12	$ 70.33
Performance Share Units [Member] | Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Shares	662,634
Granted, Shares	12,027
Vested and settled, Shares	(283,086)
Forfeited, Shares	(15,323)
Outstanding ending balance, Shares	376,252
Outstanding beginning balance, Weighted average grant date fair value (per share)	$ 51.71
Granted, Weighted average grant date fair value (per share)	57.04
Vested and settled, Weighted average grant date fair value (per share)	42.23
Forfeited, Weighted average grant date fair value (per share)	58.60
Outstanding ending balance, Weighted average grant date fair value (per share)	$ 58.73
Performance Share Units With Market Conditions [Member] | Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Shares	102,879
Forfeited, Shares	(2,691)
Outstanding ending balance, Shares	100,188
Outstanding beginning balance, Weighted average grant date fair value (per share)	$ 66.08
Forfeited, Weighted average grant date fair value (per share)	65.45
Outstanding ending balance, Weighted average grant date fair value (per share)	$ 66.10
Restricted Share Units [Member] | Equity Securities [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Shares	68,024
Granted, Shares	333,778
Assumed in acquisition, Shares	366,379
Vested and settled, Shares	(233,828)
Forfeited, Shares	(5,416)
Outstanding ending balance, Shares	528,937
Outstanding beginning balance, Weighted average grant date fair value (per share)	$ 58.32
Granted, Weighted average grant date fair value (per share)	52.11
Assumed in acquisition, Weighted average grant date fair value (per share)	52.79
Vested and settled, Weighted average grant date fair value (per share)	52.85
Forfeited, Weighted average grant date fair value (per share)	60.07
Outstanding ending balance, Weighted average grant date fair value (per share)	$ 52.97
Deferred Share Units [Member] | Debt securities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding beginning balance, Shares	108,365
Granted, Shares	12,300
Outstanding ending balance, Shares	120,665
Outstanding beginning balance, Weighted average grant date fair value (per share)	$ 39.35
Granted, Weighted average grant date fair value (per share)	52.55
Outstanding ending balance, Weighted average grant date fair value (per share)	$ 40.70