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Due From Related Party, Noncurrent, Allowance For Credit Loss

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Related Party Tax Expense, Due To (From) Affiliates, Current

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

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Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due after 1 year (or 1 business cycle).

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Amount of payable due to an entity that is affiliated with the reporting entity by means of direct or indirect ownership. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of receivables owed to an entity that is affiliated with the reporting entity by means of direct or indirect ownership, which are usually due after one year (or one business cycle, if longer).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

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SIGNIFICANT ACCOUNTING POLICIES AND OTHER FINANCIAL DATA - TRANSACTIONS WITH AFFILIATES (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 MXN ($)
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	$ 20,000,000	$ 32,000,000
Due from unconsolidated affiliates - noncurrent	780,000,000	742,000,000
Due to unconsolidated affiliates, noncurrent	(234,000,000)	(195,000,000)
Due to unconsolidated affiliates - current	$ (45,000,000)	(5,000,000)
TAG Pipeline Norte [Member]
Related Party Transaction [Line Items]
Related party transaction rate	3.16%
Due to/from Various Affiliates [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	$ (4,000,000)	(5,000,000)
LIBOR [Member] \| ESJ joint venture [Member]
Related Party Transaction [Line Items]
Variable percentage rate	1.96%
Related party transaction rate	2.11%
LIBOR [Member] \| TAG Pipeline Norte [Member]
Related Party Transaction [Line Items]
Variable percentage rate	2.90%
Sempra Mexico [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, noncurrent	$ (234,000,000)	(195,000,000)
Sempra Mexico [Member] \| ESJ joint venture [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - noncurrent	85,000,000	0
Accrued interest receivable	1,000,000
Sempra Mexico [Member] \| IMG [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - noncurrent	695,000,000	742,000,000
Due from affiliates, allowance for credit loss	3,000,000
Total facility	712,000,000		$ 14,200,000,000
Accrued interest receivable	2,000,000
Sempra Mexico [Member] \| Due From Sempra Mexico [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - noncurrent	780,000,000	742,000,000
Sempra Mexico [Member] \| TAG Pipeline Norte [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, noncurrent	$ 0	(39,000,000)
Stated percentage rate	5.50%		5.50%
Sempra Mexico [Member] \| TAG Pipeline Norte [Member] \| Other Long term Debt Currently Through December 2021 [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, noncurrent	$ (41,000,000)	0
Sempra Mexico [Member] \| TAG Pipeline Norte [Member] \| Other Long term Debt Currently Through January 2024 [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, noncurrent	(68,000,000)	0
Sempra Mexico [Member] \| TAG JV Notes [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates, noncurrent	$ (166,000,000)	(156,000,000)
Stated percentage rate	5.74%		5.74%
Sempra Mexico [Member] \| Interbank Equilibrium Rate [Member] \| IMG [Member]
Related Party Transaction [Line Items]
Variable percentage rate	2.20%
Related party transaction rate	6.66%
San Diego Gas and Electric Company [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	$ (64,000,000)	(53,000,000)
Total facility	1,500,000,000
San Diego Gas and Electric Company [Member] \| Due to/from Sempra Energy [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	(38,000,000)	(37,000,000)
Income taxes due (from) Sempra Energy	0	130,000,000
San Diego Gas and Electric Company [Member] \| Due to/from SoCalGas [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	(21,000,000)	(10,000,000)
San Diego Gas and Electric Company [Member] \| Due to/from Various Affiliates [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	(5,000,000)	(6,000,000)
Southern California Gas Company [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	22,000,000	11,000,000
Due to unconsolidated affiliates - current	(31,000,000)	(47,000,000)
Total facility	750,000,000
Southern California Gas Company [Member] \| Due to/from Sempra Energy [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	(31,000,000)	(45,000,000)
Income taxes due (from) Sempra Energy	(37,000,000)	152,000,000
Southern California Gas Company [Member] \| Due to/from Various Affiliates [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	1,000,000	1,000,000
Southern California Gas Company [Member] \| Due to/from SDGE [Member]
Related Party Transaction [Line Items]
Due from unconsolidated affiliates - current	21,000,000	10,000,000
Southern California Gas Company [Member] \| Other related parties [Member]
Related Party Transaction [Line Items]
Due to unconsolidated affiliates - current	$ 0	$ (2,000,000)