Revenue - Performance obligations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue expected timing
Revenue	$ 1,563,715	$ 1,413,377	$ 2,976,422	$ 2,670,273
Remaining performance obligations	5,100,000		5,100,000
Revenue recognized from performance obligations satisfied in previous periods	3,900		(700)
Amount of contract modifications included in the expected contract value.	$ 191,900		191,900
Amount of unapproved contract modifications recognized as revenue on a cumulative catch-up basis			177,900
Revenue recognized over time
Revenue expected timing
Revenue			$ 2,116,800	$ 1,777,600