Accumulated Other Comprehensive Income (Loss), Net of Tax

9 Months Ended

Sep. 30, 2024

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss), Net of Tax

Note 15. Accumulated Other Comprehensive Income (Loss), Net of Tax

	Three Months Ended September 30, 2024
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges			Pension and OPEB Plans			Available-for-Sale Securities			Total
	Millions
Balance as of June 30, 2024	$	20		$	(98	)	$	(95	)	$	(173	)
Other Comprehensive Income (Loss) before Reclassifications		(5	)		—			37			32
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(3	)		2			—			(1	)
Net Current Period Other Comprehensive Income (Loss)		(8	)		2			37			31
Balance as of September 30, 2024	$	12		$	(96	)	$	(58	)	$	(142	)
	Three Months Ended September 30, 2023
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges			Pension and OPEB Plans			Available-for-Sale Securities			Total
	Millions
Balance as of June 30, 2023	$	7		$	(419	)	$	(103	)	$	(515	)
Other Comprehensive Income (Loss) before Reclassifications		13			82			(36	)		59
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(2	)		240			5			243
Net Current Period Other Comprehensive Income (Loss)		11			322			(31	)		302
Balance as of September 30, 2023	$	18		$	(97	)	$	(134	)	$	(213	)
	Nine Months Ended September 30, 2024
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges			Pension and OPEB Plans			Available-for-Sale Securities			Total
	Millions
Balance as of December 31, 2023	$	3		$	(102	)	$	(80	)	$	(179	)
Other Comprehensive Income (Loss) before Reclassifications		17			—			18			35
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(8	)		6			4			2
Net Current Period Other Comprehensive Income (Loss)	$	9		$	6		$	22		$	37
Balance as of September 30, 2024	$	12		$	(96	)	$	(58	)	$	(142	)
	Nine Months Ended September 30, 2023
Accumulated Other Comprehensive Income (Loss)	Cash Flow Hedges			Pension and OPEB Plans			Available-for-Sale Securities			Total
	Millions
Balance as of December 31, 2022	$	(3	)	$	(426	)	$	(121	)	$	(550	)
Other Comprehensive Income (Loss) before Reclassifications		23			82			(28	)		77
Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)		(2	)		247			15			260
Net Current Period Other Comprehensive Income (Loss)		21			329			(13	)		337
Balance as of September 30, 2023	$	18		$	(97	)	$	(134	)	$	(213	)

		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Statement of Operations
		Three Months Ended									Nine Months Ended
		September 30, 2024									September 30, 2024
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount In Statement of Operations	Pre-Tax Amount			Tax (Expense) Benefit			After-Tax Amount			Pre-Tax Amount			Tax (Expense) Benefit			After-Tax Amount
		Millions
Cash Flow Hedges
Interest Rate Derivatives	Interest Expense	$	4		$	(1	)	$	3		$	11		$	(3	)	$	8
Total Cash Flow Hedges			4			(1	)		3			11			(3	)		8
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Net Non-Operating Pension and OPEB Credits (Costs)		(1	)		—			(1	)		(1	)		—			(1	)
Amortization of Net Actuarial Loss	Net Non-Operating Pension and OPEB Credits (Costs)		(2	)		1			(1	)		(7	)		2			(5	)
Total Pension and OPEB Plans			(3	)		1			(2	)		(8	)		2			(6	)
Available-for-Sale Debt Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments		—			—			—			(6	)		2			(4	)
Total Available-for-Sale Debt Securities			—			—			—			(6	)		2			(4	)
Total		$	1		$	—		$	1		$	(3	)	$	1		$	(2	)

		Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) to Statement of Operations
		Three Months Ended									Nine Months Ended
		September 30, 2023									September 30, 2023
Description of Amounts Reclassified from Accumulated Other Comprehensive Income (Loss)	Location of Pre-Tax Amount In Statement of Operations	Pre-Tax Amount			Tax (Expense) Benefit			After-Tax Amount			Pre-Tax Amount			Tax (Expense) Benefit			After-Tax Amount
		Millions
Cash Flow Hedges
Interest Rate Derivatives	Interest Expense	$	3		$	(1	)	$	2		$	3		$	(1	)	$	2
Total Cash Flow Hedges			3			(1	)		2			3			(1	)		2
Pension and OPEB Plans
Amortization of Prior Service (Cost) Credit	Net Non-Operating Pension and OPEB Credits (Costs)		2			(1	)		1			6			(2	)		4
Amortization of Net Actuarial Loss	Net Non-Operating Pension and OPEB Credits (Costs)		(3	)		1			(2	)		(17	)		5			(12	)
Pension Settlement Charge	Net Non-Operating Pension and OPEB Credits (Costs)		(332	)		93			(239	)		(332	)		93			(239	)
Total Pension and OPEB Plans			(333	)		93			(240	)		(343	)		96			(247	)
Available-for-Sale Debt Securities
Realized Gains (Losses)	Net Gains (Losses) on Trust Investments		(8	)		3			(5	)		(25	)		10			(15	)
Total Available-for-Sale Debt Securities			(8	)		3			(5	)		(25	)		10			(15	)
Total		$	(338	)	$	95		$	(243	)	$	(365	)	$	105		$	(260	)