Revenue Recognition Contract Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract With Customer, Liability [Line Items]
Contract with Customer, Liability - Beginning of Period	$ 1,043	$ 1,126
Contract with Customer, Liability, Cumulative Catch-up Adjustment to Revenue, Change in Measure of Progress	190	180
Other Significant Noncash Transaction, Value of Consideration Received	9	9
Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination	115	2
Contract with Customer, Liability, Revenue Recognized	(276)	(274)
Contract with Customer, Liability - End of Period	$ 1,081	$ 1,043