Property, Plant And Equipment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 20,216		$ 19,318
Capital expenditures	757	$ 666
Vendor financing payments	16
Accounts payable and accrued liabilities associated with capital	694
Other current liabilities associated with capital expenditures	12
Other liabilities associated with capital expenditures	35
Capitalized interest	15
Materials And Supplies [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	448		$ 431
Maximum [Member]
Property, Plant and Equipment [Line Items]
Vendor financing payables associated with capital expenditures	$ 1