Basis of Presentation (Unaudited) Backlog and Contract Assets and Liabilities (Details 3) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jan. 31, 2024	Mar. 31, 2024	Mar. 31, 2023
Change in Contract with Customer, Liability [Abstract]
Contract with Customer, Liability, Revenue Recognized		$ 1,900	$ 1,700
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Amount		$ 78,900
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog Reduction due to Contract Termination	$ 1,600
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-03-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage		40.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Percentage		65.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		24 months