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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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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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Amount of gain (loss) from the difference between the repurchase price of a debt instrument initially issued by the entity and the net carrying amount of the debt at the time of its repurchase.

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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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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 third 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 payment for pension benefits. Excludes other postretirement benefits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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No definition available.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of cash inflow from debt classified as other.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Amount of cash outflow for the payment of debt classified as other.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of 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	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Debt Activity [Line Items]
Payment for Pension Benefits				$ 1,250	$ 750	$ 750
Debt Instrument, Maturity Date Range, Start				Apr. 01, 2015	Apr. 01, 2015	Apr. 01, 2015
Debt Instrument, Maturity Date Range, End				Dec. 01, 2030	Dec. 01, 2030	Dec. 01, 2030
Gain (Loss) on Repurchase of Debt Instrument				$ 82	$ 31
Maturities of long-term debt, 2017		$ 311		311
Maturities of long-term debt, 2018		126		126
Maturities of long-term debt, 2019		164		164
Maturities of long-term debt, 2020		440		440
Maturities of long-term debt, 2021		956		956
Debt covenant compliance, minimum net worth		$ 9,000		$ 9,000
Debt covenant compliance, minimum debt to capital ratio				60.00%
4.35% Senior Unsecured Notes [Member]
Schedule of Debt Activity [Line Items]
Proceeds from issuance of debt				$ 1,000
Debt Instrument, Interest Rate, Stated Percentage		4.35%		4.35%
Maturity date, range low				Feb. 15, 2048
Long-term Debt [Member]
Schedule of Debt Activity [Line Items]
Proceeds from issuance of debt		$ 660
Proceeds from Other Debt				$ 660
Three Point Zero Percentage Fixed Rate Loan [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					3.00%
Maturity date, range low					Feb. 15, 2027
Proceeds from Issuance of Unsecured Debt					$ 1,100
Four Point Four Percentage Fixed Rate Loan [Member] [Member] [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					4.40%
Maturity date, range low					Aug. 15, 2047
Proceeds from Issuance of Unsecured Debt					$ 1,200
Unsecured Debt [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					7.95%
Maturity date, range low					Jan. 01, 2018
Repayments of Debt					$ 266
Extinguishment of Debt, Type [Domain]
Schedule of Debt Activity [Line Items]
Repayments of Other Debt				900
Commercial Paper [Member]
Schedule of Debt Activity [Line Items]
Revolving credit facilities available		750		750
Short-term Debt		180		180
Credit Facility Agreements [Member]
Schedule of Debt Activity [Line Items]
Contractually committed credit facilities		2,100		2,100
Revolving Credit Facility [Member]
Schedule of Debt Activity [Line Items]
Revolving credit facilities available		1,500		$ 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, 2018
Commercial paper-based financings agreement value		$ 600		$ 600
Early debt extinguishment costs (see Note 13)
Schedule of Debt Activity [Line Items]
Write off of Deferred Debt Issuance Cost				$ 83	$ 29
Minimum [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.57%		1.57%	1.57%	1.57%
Minimum [Member] \| Extinguishment of Debt, Type [Domain]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		1.92%		1.92%
Debt Instrument, Maturity Date Range, Start				Jan. 01, 2018
Maximum [Member]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.38%		9.38%	9.38%	9.38%
Maximum [Member] \| Extinguishment of Debt, Type [Domain]
Schedule of Debt Activity [Line Items]
Debt Instrument, Interest Rate, Stated Percentage		9.38%		9.38%
Debt Instrument, Maturity Date Range, End				Jan. 01, 2021
Scenario, Forecast [Member] \| Revolving Credit Facility [Member]
Schedule of Debt Activity [Line Items]
Line of credit, maturity date	Dec. 26, 2021