Revenue - Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue from Contract with Customer [Abstract]
Revenue from customers	$ 6,880	$ 4,018	$ 18,166	$ 12,576
All other revenues	(88)	90	(123)	1,073
Net sales	$ 6,792	$ 4,108	$ 18,043	$ 13,649