Long-term debt and interest expense, net - Interest expense on long term debts and other obligations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Interest expenses
Interest on long-term debt	$ 54	$ 45
Interest expense on advance payments from customers	2	5
Interest on orbital securitization liability	1	2
Capitalized interest	(8)	(3)
Total interest expense	$ 49	$ 49