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Fair Value Disclosures (Fair Value Hierarchy, Carrying Values, and Estimated Fair Values of Financial Instruments) (Details) - Level 2 - Senior Notes [Member] - USD ($)
$ in Thousands
May 31, 2020
Nov. 30, 2019
Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior notes [1] $ 1,741,668 $ 1,740,858
Estimate of Fair Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Senior notes $ 1,862,750 $ 1,921,563
[1] The carrying values for the senior notes include unamortized debt issuance costs. Debt issuance costs are not factored into the estimated fair values of these notes.