Available liquidity facilities with outside banks and third parties.

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Debt covenant compliance, minimum net worth

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[Line Items] for Schedule of Debt Activity [Table]

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The total of collateralized agreements including securities purchased under agreements to resell (repos), borrowed securities, and secured demand notes.

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Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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

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Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

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The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

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No definition available.

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Date the credit facility terminates, in CCYY-MM-DD format.

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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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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of cash outflow for pension benefit. Includes, but is not limited to, employer contribution to fund plan asset and payment to retiree. Excludes other postretirement benefit.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Debt And Lines Of Credit (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Debt Activity [Line Items]
Payment for Pension Benefits			$ 0	$ 1,250	$ 750
Debt Instrument, Maturity Date Range, Start			Jun. 15, 2018	Jun. 15, 2018	Jun. 15, 2018
Debt Instrument, Maturity Date Range, End			Sep. 01, 2032	Sep. 01, 2032	Sep. 01, 2032
Maturities of long-term debt, 2019			$ 639
Maturities of long-term debt, 2020			83
Maturities of long-term debt, 2021			441
Maturities of long-term debt, 2022			487
Maturities of long-term debt, 2023			348
Debt covenant compliance, minimum net worth			$ 9,000
Debt covenant compliance, minimum debt to capital ratio			60.00%
Long-term Debt [Member]
Schedule of Debt Activity [Line Items]
Proceeds from issuance of debt		$ 660
Commercial Paper [Member]
Schedule of Debt Activity [Line Items]
Revolving credit facilities available			$ 1,000		$ 750
Short-term Debt			465
Credit Facility [Domain]
Schedule of Debt Activity [Line Items]
Contractually committed credit facilities			2,100
Revolving Credit Facility [Member]
Schedule of Debt Activity [Line Items]
Revolving credit facilities available			$ 1,500
Credit agreement facility fee			0.15%
Receivables Securitization Program [Member]
Schedule of Debt Activity [Line Items]
Line of credit, maturity date			Dec. 31, 2019
Commercial paper-based financings agreement value			$ 600
Minimum [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.57%	1.57%	1.57%	1.57%
Maximum [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.38%	9.38%	9.38%	9.38%
Scenario, Forecast [Member] \| Revolving Credit Facility [Member]
Schedule of Debt Activity [Line Items]
Line of credit, maturity date	Dec. 26, 2021