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Financial Statement Information Receivables (Policies)
3 Months Ended
Mar. 31, 2020
Receivables [Abstract]  
Receivable [Policy Text Block]
Allowance for Credit Losses
Management evaluates the aging of customer receivable balances, the financial condition of our customers, historical trends, and macroeconomic factors to estimate the amount of customer receivables that may not be collected in the future and records a provision it believes is appropriate. Our reserve for expected lifetime credit losses was approximately $60 million and $53 million at March 31, 2020 and December 31, 2019, respectively. The increase in our allowance for credit losses since December 31, 2019 is attributable to the $3 million effect of the adoption of ASU No. 2016-13 (see the Recently Adopted Accounting Pronouncements section below for further detail) and an increase in expected lifetime losses primarily attributable to the downturn in the global economy related to the effects of the COVID-19 pandemic.