Stock Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	May 21, 2025
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years
Expense amortization period	3 years
Pre-tax compensation expense	$ 51	$ 50	$ 47
Deferred tax benefit	12	12	12
Unamortized compensation expense	$ 89
Weighted-average period of recognition, in years	2 years
Weighted-average grant date fair value	$ 64	$ 67	$ 56
Weighted-average grant date fair value, per share (in USD per share)	$ 55.95	$ 43.29	$ 46.38
Total fair value vested	$ 56	$ 35	$ 40
Granted, number of shares (in shares)	1,152,361
Number of shares remaining (in shares)	3,933,158	3,973,485
Grant date fair value (in USD per share)	$ 48.14	$ 45.87
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period, in years	3 years
Pre-tax compensation expense	$ 11	$ 6	$ 11
Unamortized compensation expense	$ 16
Granted, number of shares (in shares)	257,920	290,980	255,601
Number of shares remaining (in shares)	767,341
Grant date fair value (in USD per share)	$ 49.39
Common Stock [Member] | 2020 Performance Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares issuable under the stock compensation plan (in shares)				25,000,000
Shares available to be granted (in shares)	24,827,825
Common Stock [Member] | 2015 Directors Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares issuable under the stock compensation plan (in shares)				1,000,000
Shares available to be granted (in shares)	1,000,000