Short-Term Borrowings (Tables)	12 Months Ended
Dec. 31, 2021
Short-Term Borrowings [Abstract]
Schedule Of Short-Term Borrowings	At December 31, 2021 2020Total credit facility borrowing capacity $ 2,000 $ 2,000Credit facility outstanding borrowings - -Commercial paper outstanding (a) (215) (70)Letters of credit outstanding (b) (8) (9)Available unused credit $ 1,777 $ 1,921____________(a)The weighted average interest rates for commercial paper were 0.30% and 0.17% at December 31, 2021 and December 31, 2020, respectively.(b)Interest rates on outstanding letters of credit at December 31, 2021 and December 31, 2020 were 1.20% and 1.45%, respectively, based on our credit ratings.

Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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