Common Stock, Special Cash Dividends, Per Share Declared

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Line Of Credit Facility Increase Additional Borrowings

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Amount specified in the debt agreement of the maximum debt-to-total capitalization level which the entity is allowed to reach without impacting the entity's ability to borrow under the agreement.

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- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

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- Definition

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

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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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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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

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Maximum amount borrowed under the credit facility at any time during the period.

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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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Weighted average interest rate of short-term debt outstanding calculated over time.

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Amount of stock repurchase plan authorized.

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Long-Term Debt and Common Stock (Details) - USD ($)			3 Months Ended		9 Months Ended		12 Months Ended
Long-Term Debt and Common Stock (Details) - USD ($)	Nov. 04, 2021	May 06, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument Table [Line Items]
Common Stock Dividends Declared (in dollars per share)			$ 0.4125	$ 0.375	$ 2.2375	$ 1.125	$ 0.375
Special Cash Dividend Declared (in dollars per share)		$ 1.00
Subsequent Event
Debt Instrument Table [Line Items]
Common Stock Dividends Declared (in dollars per share)	$ 0.75
Special Cash Dividend Declared (in dollars per share)	$ 2.00
Stock Repurchase Program, Authorized Amount	$ 5,000,000,000
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity			$ 0		$ 0		$ 0
Revolving Credit Agreement (New Facility) [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity			$ 2,000,000,000		$ 2,000,000,000
Line of Credit Facility, Expiration Date					Jun. 27, 2024
Revolving Credit Agreement 2020 [Member]
Line of Credit Facility [Line Items]
Line Of Credit Facility Increase Additional Borrowings					$ 3,000,000,000
Maximum Total Debt To Total Capitalization Ratio Allowed Under Financial Covenant			65.00%		65.00%
Borrowings Outstanding					$ 0		$ 0
Eurodollar [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate (in hundredths)					98.00%
Base Rate [Member]
Line of Credit Facility [Line Items]
Weighted average interest rate (in hundredths)					325.00%
4.100% Senior Notes Due 2021 [Member]
Debt Instrument Table [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			4.10%		4.10%
Debt Instrument, Face Amount			$ 750,000,000		$ 750,000,000