Business Segments - Business Segment Reporting Information (Details) (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues from External Customers and Long-Lived Assets [Line Items]
Other	$ 40		$ 67
Insurance Deductible For Severe Weather Event In Tupelo [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Other		$ 14		$ 14
Insurance Deductible For Severe Weather Event In Mississippi [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Other		$ 14		$ 14