Revenue - Contract assets and liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Contract assets and contract liabilities
Contract Liabilities	$ 279	$ 275
Earth intelligence
Contract assets and contract liabilities
Contract Liabilities	45	130
Earth intelligence | Enhanced View contract
Contract assets and contract liabilities
Contract Liabilities	0	78
Increase in contract liability due to imputed interest on advance payments	3
Revenue recognized	81
Space Infrastructure
Contract assets and contract liabilities
Contract Liabilities	$ 234	$ 145