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Fair Value Measurements (Additional Information) (Details)
$ in Billions
Sep. 30, 2020
USD ($)
Fair Value Measurements [Line Items]  
Debt obligations, carrying amount $ 37.8
Line of Credit, Current 1.0
Long-term Debt 5.5
Commercial Paper 0.9
Debt, Current 1.4
Level 2  
Fair Value Measurements [Line Items]  
Debt obligations, fair value $ 43.4
Minimum [Member]  
Fair Value Measurements [Line Items]  
Debt Instrument, Interest Rate, Stated Percentage 1.45%
Maximum [Member]  
Fair Value Measurements [Line Items]  
Debt Instrument, Interest Rate, Stated Percentage 4.20%