Revenue - Contract assets and liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Contract assets and contract liabilities
Contract Liabilities	$ 275	$ 392
Imagery | EnhancedView contract
Contract assets and contract liabilities
Contract Liabilities	78	184
Increase in contract liability due to imputed interest on advance payments	15
Revenue recognized	120
Earth intelligence
Contract assets and contract liabilities
Contract Liabilities	130	243
Space Infrastructure
Contract assets and contract liabilities
Contract Liabilities	$ 145	$ 149