Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
New Accounting Pronouncements	In the first quarter of 2020, we adopted Accounting Standards Update (ASU) 2016-13, Financial Instruments – Credit Losses.  This ASU makes changes to the impairment model for trade receivables, net investments in leases, debt securities, loans and certain other instruments.  The standard requires the use of a forward-looking "expected loss" model compared with the prior "incurred loss" model.  We calculate expected credit losses for our receivables using the probability of default and the expected loss given default.  Historical data, current market conditions, and forecasts of future economic conditions are used to determine the probability of default and the expected loss given default.  The adoption of this ASU did not have a material impact to our financial statements.