Employee Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Trend rate next fiscal year		6.20%
Ultimate trend rate		4.50%
Contributions next fiscal year		$ 15
Contribution costs		$ 143	$ 158	$ 166
Percentage of plans outside of US		17.00%
Principal Plans
Defined Benefit Plan Disclosure [Line Items]
Expected long-term return on plan assets		6.34%	5.73%	6.05%
U.S. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Aggregate notional value		$ 269	$ 278
U.K. Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Aggregate notional value		$ 501	$ 418
Forecast | Principal Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	85.00%
Expected long-term return on plan assets	6.24%
Forecast | Principal Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	15.00%