Provision (Benefit) for Income Taxes Deferred Tax Table (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2022
Gross deferred income tax liabilities:
Property, plant and equipment	$ 3,541	$ 3,171
Investments	1,740	1,784
Other	146	138
Total gross deferred income tax liabilities	5,427	5,093
Gross deferred income tax assets:
Accrued liabilities	935	1,108
Foreign tax credits	35	91	$ 70
Federal loss carryovers	398	730
State losses and credits	293	356
Other	103	121
Total gross deferred income tax assets	1,764	2,406
Less valuation allowance	183	200
Net deferred income tax assets	1,581	2,206
Deferred income tax liabilities	$ 3,846	$ 2,887