Financial Instruments and Fair Value Measures - Summary of Financial Assets and Liabilities Not Carried at Fair Value (Details) $ in Millions	Jun. 30, 2020 USD ($)
Carrying Value
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt and related current maturities	$ 1,407
Fair Value | Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt and related current maturities	$ 1,309