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, 2021	Mar. 31, 2020
Interest expenses
Interest on long-term debt	$ 44	$ 54
Loss on debt extinguishment	41
Interest on orbital securitization liability	1	1
Interest expense on advance payments from customers		2
Imputed interest and other	1
Capitalized interest	(9)	(8)
Interest expense, net	$ 78	$ 49