Percentage of lower of fair value or cost of property additions.

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

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Amount of assets pledged to secure a debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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

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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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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount of unused borrowing capacity under the long-term financing arrangement that is available to the entity as of the balance sheet date.

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Total carrying amount as of the balance sheet date of unearned revenue or income, not otherwise specified in the taxonomy, which is expected to be taken into income in future periods and obligations not separately disclosed in the balance sheet (other liabilities).

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

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Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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Long-Term Debt (Narrative) (Details) - USD ($)		3 Months Ended
Long-Term Debt (Narrative) (Details) - USD ($)	Mar. 01, 2022	Mar. 31, 2022	Jan. 28, 2022	Dec. 31, 2021
Long-Term Debt [Line Items]
Repayments of long-term debt		$ 400,000,000
Estimated fair value of our long-term debt including current maturities		11,476,000,000		$ 11,758,000,000
Carrying amount		10,819,000,000		10,032,000,000.000
Term Loan Credit Agreement, 1 [Member]
Long-Term Debt [Line Items]
Debt principal amount		400,000,000
Term Loan Credit Agreement, 2 [Member]
Long-Term Debt [Line Items]
Debt principal amount		600,000,000
Term Loan Credit Agreement, 3 [Member]
Long-Term Debt [Line Items]
Debt principal amount		185,000,000
Term Loan Credit Agreement, 4 [Member]
Long-Term Debt [Line Items]
Debt principal amount		115,000,000
Term Loan Credit Agreement [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		1,185,000,000
Available for borrowing		$ 0
4.10% Senior Notes Due June 1, 2022 [Member]
Long-Term Debt [Line Items]
Interest rate		4.10%
Debt principal amount		$ 400,000,000
4.10% Senior Notes Due June 1, 2022 [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Long-Term Debt [Line Items]
Spread over variable rate		0.575%
4.10% Senior Notes Due June 1, 2022 [Member] \| One-Month Secured Overnight Financing Rate [Member]
Long-Term Debt [Line Items]
Spread over variable rate		0.10%
4.10% Senior Notes Due June 1, 2022 [Member] \| Federal Funds Effective Rate [Member]
Long-Term Debt [Line Items]
Spread over variable rate		0.50%
4.10% Senior Notes Due June 1, 2022 [Member] \| Daily Secured Overnight Financing Rate [Member]
Long-Term Debt [Line Items]
Spread over variable rate		1.00%
Secured Debt [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 9,727,000,000		10,127,000,000
Percentage of fair value of cost of property additions certified to the Deed of Trust collateral agent		85.00%
Available bond credits		$ 2,112,000,000
Future debt subject to property additions to the Deed of Trust		5,110,000,000
Secured Debt [Member] \| 0.55% Senior Notes Due October 1, 2025 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 450,000,000		$ 450,000,000
Interest rate		0.55%		0.55%
Secured Debt [Member] \| 2.75% Senior Notes Due May 15, 2030 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 700,000,000		$ 700,000,000
Interest rate		2.75%		2.75%
Secured Debt [Member] \| 2.70% Senior Notes Due November 15, 2051 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 500,000,000		$ 500,000,000
Interest rate		2.70%
Secured Debt [Member] \| 3.70% Senior Notes Due May 15, 2050 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 400,000,000		$ 400,000,000
Interest rate		3.70%		3.70%
Secured Debt [Member] \| 7.00% Senior Notes Due May 1, 2032 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 494,000,000		$ 494,000,000
Interest rate		7.00%		7.00%
Secured Debt [Member] \| 7.25% Senior Notes Due January 15, 2033 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 323,000,000		$ 323,000,000
Interest rate		7.25%		7.25%
Secured Debt [Member] \| 5.30% Senior Notes Due June 1, 2042 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 348,000,000		$ 348,000,000
Interest rate		5.30%		5.30%
Secured Debt [Member] \| 5.35% Senior Notes Due October 1, 2052 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount		$ 300,000,000		$ 300,000,000
Interest rate		5.35%		5.35%
Secured Debt [Member] \| 4.10% Senior Notes Due June 1, 2022 [Member]
Long-Term Debt [Line Items]
Aggregate principal amount				$ 400,000,000
Interest rate		4.10%		4.10%
Unsecured Debt [Member]
Long-Term Debt [Line Items]
Unsecured term loan aggregate principal amount		$ 1,185,000,000
Unsecured Debt [Member] \| June 2021 Term Loan Credit Agreement Maturing August 15, 2022 [Member]
Long-Term Debt [Line Items]
Unsecured term loan aggregate principal amount		$ 1,185,000,000
Unsecured Debt [Member] \| January 2022 Term Loan Credit Agreement [Member]
Long-Term Debt [Line Items]
Unsecured term loan aggregate principal amount			$ 1,300,000,000
Unsecured Debt [Member] \| 2022 Notes [Member]
Long-Term Debt [Line Items]
Debt principal amount	$ 400,000,000
Redemption percentage	100.00%