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New Accounting Pronouncements (Policy)
 9 Months Ended
Sep. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]  
Allowance for credit losses A considerable amount of judgment is required in determining expected credit losses. Credit losses are recorded when we believe a customer, or group of customers, may not be able to meet their financial obligations due to deterioration in financial condition or credit rating. Relevant factors include our prior collection history with our customers, the related aging of past due balances, projections of credit losses based on historical trends in credit quality indicators or past events, and forecasts of future economic conditions. In addition to monitoring delinquent accounts, management reviews the credit quality of its receivables by, among other things, obtaining credit ratings of significant customers, assessing economic and market conditions, and evaluating material changes to a customer’s business, cash flows, and financial condition.