Property, Plant And Equipment (Narrative) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 21,151,000,000		$ 19,318,000,000
Capital expenditures	1,602,000,000	$ 1,292,000,000
Vendor financing payments	16,000,000
Accounts payable and accrued liabilities associated with capital	732,000,000
Other current liabilities associated with capital expenditures	13,000,000
Other liabilities associated with capital expenditures	45,000,000
Vendor financing payables associated with capital expenditures	0
Capitalized interest	31,000,000
Materials And Supplies [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment	$ 374,000,000		$ 431,000,000