Long-term debt and interest expense, net - Interest expense on long term debts and other obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest expenses
Interest on long-term debt	$ 191	$ 194	$ 171
Interest on orbital securitization liability	5	7	7
Interest expense on advance payments from customers	3	15	26
Imputed interest and other	2
Loss on debt extinguishment	7	22
Interest expense on dissenting stockholder liability			3
Capitalized interest	(33)	(19)	(7)
Interest expense, net	$ 175	$ 219	$ 200