Employee Benefits Schedule of Defined Benefit Plan Disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair value of plan assets:
Actuarial loss (gain)	$ (15)	$ (5)
Defined Benefit Plan, Plan Assets, Payment for Settlement	(13)
Classification in consolidated balance sheet:
Noncurrent asset	(38)	(45)
Assumptions used:
Defined Benefit Plan, Benefit Obligation, Changes Between Actual and Expected Return on Plan Assets, Gains	2	2
2020 Labor Day wildfire earnings test reserve	15	0	$ 0
Pension Plans, Defined Benefit [Member]
Benefit obligation:
As of January 1	695	972	1,010
Fair value of plan assets:
Service cost	17	19	17
Interest cost on benefit obligation	28	27	31
Actuarial loss (gain)	(255)	(26)
Benefit payments	(69)	(47)
Defined Benefit Plan, Plan Assets, Administration Expense	(3)	(3)
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(5)	8
As of January 1	547	800	753
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(148)	(172)
Net actuarial loss (gain) included in comprehensive income	(28)	(78)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0
Other Postretirement Benefits Cost (Reversal of Cost)	(1)	(8)
Defined Benefit Plan, Amortization of Gain (Loss)	(15)	(22)	$ (17)
Total Amounts included in comprehensive income	(36)	(109)
Defined Benefit Plan, Accumulated Benefit Obligation	656	885
Actual return on plan assets	(181)	97
Company contributions	0	0
Classification in consolidated balance sheet:
Noncurrent asset	0	0
Current liability	0	0
Noncurrent liability	(148)	(172)
Amounts included in AOCL:
Net actuarial loss	96	139
Prior service cost	(5)	9
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ 95	$ 131
Assumptions used:
Discount rate used to calculate benefit obligation	2.92%	2.64%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.21%	4.26%	3.65%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.75%	6.88%
Defined Benefit Plan, Benefit Obligation, Changes Between Actual and Expected Return on Plan Assets, Gains	$ 227	$ 52
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	2	0	$ 0
Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets:
As of January 1	0	0
Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets:
As of January 1	16	25
Pension Plans, Defined Benefit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets:
As of January 1	0	0
Other Postretirement Benefit Plans [Member]
Benefit obligation:
As of January 1	43	71	76
Fair value of plan assets:
Service cost	1	2	2
Interest cost on benefit obligation	2	2	2
Actuarial loss (gain)	15	5
Benefit payments	(4)	(5)
Defined Benefit Plan, Plan Assets, Administration Expense	0	0
Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment	(1)	(1)
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Curtailment		0
As of January 1	21	37	35
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(22)	(34)
Net actuarial loss (gain) included in comprehensive income	(8)	(7)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	11	0	0
Other Postretirement Benefits Cost (Reversal of Cost)	0	(7)
Defined Benefit Plan, Amortization of Gain (Loss)	0	0	$ 0
Total Amounts included in comprehensive income	3	(6)
Actual return on plan assets	(6)	4
Company contributions	7	3
Classification in consolidated balance sheet:
Noncurrent asset	0	0
Current liability	(1)	0
Noncurrent liability	(21)	(34)
Amounts included in AOCL:
Net actuarial loss	(7)	(3)
Prior service cost	0	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ (7)	$ (10)
Assumptions used:
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	4.04%	4.13%	4.58%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.83%	5.04%
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	$ 0	$ 1	$ 1
Other Postretirement Benefit Plans [Member] | Fair Value, Inputs, Level 3 [Member]
Fair value of plan assets:
As of January 1	0	0
Other Postretirement Benefit Plans [Member] | Fair Value, Inputs, Level 1 [Member]
Fair value of plan assets:
As of January 1	7	13
Other Postretirement Benefit Plans [Member] | Fair Value, Inputs, Level 2 [Member]
Fair value of plan assets:
As of January 1	6	10
Non Qualified Benefit Plans [Member]
Benefit obligation:
As of January 1	18	27	28
Fair value of plan assets:
Service cost	0	0	0
Interest cost on benefit obligation	1	1	1
Actuarial loss (gain)	7	0
Benefit payments	(3)	(2)
Defined Benefit Plan, Plan Assets, Administration Expense	0	0
As of January 1	19	21	19
Defined Benefit Plan, Funded (Unfunded) Status of Plan	1	(6)
Net actuarial loss (gain) included in comprehensive income	(7)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	0	0	0
Other Postretirement Benefits Cost (Reversal of Cost)	0	0
Defined Benefit Plan, Amortization of Gain (Loss)	(1)	(1)	(1)
Total Amounts included in comprehensive income	(8)	(2)
Defined Benefit Plan, Accumulated Benefit Obligation	17	23
Actual return on plan assets	(2)	1
Company contributions	3	3
Classification in consolidated balance sheet:
Noncurrent asset	(19)	(21)
Current liability	(2)	(2)
Noncurrent liability	(16)	(25)
Amounts included in AOCL:
Net actuarial loss	6	14
Prior service cost	0	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	$ 6	$ 14
Assumptions used:
Discount rate used to calculate benefit obligation	2.92%	2.64%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase	5.10%	4.10%
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	$ 0	$ 0	$ 0