Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Debt

Debt outstanding, excluding finance leases, was as follows (in millions):

	December 31, 2022 a				December 31, 2021 a
Notes and debentures, due through 2097	$	22,719	4.6	%	$	22,519	4.6	%
Equipment obligations, due through 2028	378		3.6		402		3.6
Mortgage bonds, due through 2047	47		3.1		47		3.1
Financing obligations, due through 2029	298		4.6		203		6.1
Unamortized fair value adjustment under acquisition method accounting, discount, debt issuance costs, and other, net	(105)				(91)
Total	23,337				23,080
Less current portion of long-term debt	(1,538)		3.5	%	(903)		4.7	%
Long-term debt	$	21,799			$	22,177

a  Amounts represent debt outstanding and weighted average effective interest rates for 2022 and 2021, respectively. Maturities are as of December 31, 2022.

Schedule of Maturities of Long-term Debt

The following table provides principal cash flows and fair value information for the Company’s debt obligations.

	December 31, 2022
	Maturity Date						Total	Fair Value
	2023	2024	2025	2026	2027	Thereafter
Debt maturities (in millions)	$1,538	$1,242	$1,239	$48	$750	$18,520	$23,337	$21,543