Basis of Presentation (Unaudited) Backlog and Contract Assets and Liabilities (Details 3) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized	$ 466	$ 482	$ 1,900	$ 1,500
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 80,000		$ 80,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Explanation			Of our June 30, 2022 backlog, we expect to recognize approximately 40 percent as revenue over the next 12 months and 60 percent as revenue over the next 24 months, with the remainder to be recognized thereafter.