Revenue (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Operating-type lease and sales-type lease, revenues	$ 410	$ 419	$ 422
Contract with customer, asset, net	54	77
Contract with customer, liability	1,700	1,700
Contract with customer, liability, revenue recognized	$ 1,300	$ 1,300