Segment Information - Operating Revenue and Property, Plant and Equipment by Country (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 25,920	$ 25,602	$ 26,337
Property, plant and equipment, net	103,769	99,248	93,043
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23,574	23,593	24,263
Property, plant and equipment, net	89,958	85,128	79,578
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,577	1,277	1,345
Property, plant and equipment, net	7,890	7,710	6,959
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	719	706	709
Property, plant and equipment, net	5,705	6,178	6,091
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44	20	20
Property, plant and equipment, net	216	232	415
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 6	$ 6	$ 0