Leases - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) mi	Dec. 31, 2022 USD ($)
Lessee, Lease, Description [Line Items]
Right of Use Asset	$ 498	$ 505
Right-of-use asset recognized as non-cash asset addition	56	74
Cash paid for amounts included in measurement of operating lease liabilities	$ 78	$ 76
State of Georgia
Lessee, Lease, Description [Line Items]
Term of lease agreement	50 years
Number of miles of right-of-way with integral equipment leased | mi	137
Percentage of annual increase in operating lease	2.50%
Maximum | Other parties
Lessee, Lease, Description [Line Items]
Term of lease agreement	50 years