Provision (Benefit) for Income Taxes Deferred Tax Table (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Deferred income tax liabilities:
Property, plant and equipment	$ 2,320	$ 1,921
Investments	1,515	1,411
Other	140	82
Total deferred income tax liabilities	3,975	3,414
Deferred income tax assets:
Accrued liabilities	747	729
Minimum tax credit	0	29
Foreign tax credit	140	140
Federal loss carryovers	905	544
State losses and credits	445	362
Other	140	147
Total deferred income tax assets	2,377	1,951
Less valuation allowance	325	319
Net deferred income tax assets	2,052	1,632
Overall net deferred income tax liabilities	$ 1,923	$ 1,782