Annual report pursuant to Section 13 and 15(d)

Financial Instruments (Details)

v3.19.3.a.u2
Financial Instruments (Details) - USD ($)
$ in Billions
Dec. 31, 2019
Dec. 31, 2018
Recurring | Level 2 market data    
Financial Instruments    
Fair value of senior notes $ 2.8 $ 3.9