Share-Based Compensation (Summary Of Stock Option Award Activity) (Details) - Stock Options - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2024		Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of options exercised		$ 75		$ 136	$ 247
Unrecognized compensation cost		$ 0
Number of Shares
Outstanding, beginning balance		1,044,011
Exercised		(537,951)
Outstanding, ending balance		506,060	[1]	1,044,011
Vested and expected to vest at December 31, 2024 (in shares)	[1]	506,060
Exercisable at December 31, 2024 (in shares)	[1]	506,060
Weighted Average Exercise Price
Outstanding, beginning balance (in USD per share)		$ 52.07
Exercised (in USD per share)		46.97
Outstanding, ending balance (in USD per share)		57.50	[1]	$ 52.07
Vested and expected to vest at December 31, 2024 (in USD per share)	[1]	57.50
Exercisable at December 31, 2024 (in USD per share)	[1]	$ 57.50
Weighted Average Remaining Contractual Terms (in years)
Vested and expected to vest at December 31, 2024	[1]	3 years 10 months 24 days
Exercisable at December 31, 2024 (in years)	[1]	3 years 10 months 24 days
Aggregate Intrinsic Value (Millions of dollars)
Vested and expected to vest at December 31, 2024 (in USD)	[1]	$ 41
Exercisable at December 31, 2024 (in USD)	[1]	$ 41

[1] All options outstanding at December 31, 2024 are fully vested and exercisable