Fair Value Measurements and Derivative Instruments (Offsetting of Derivative Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Offsetting of Financial Assets under Master Netting Agreements [Abstract]
Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet	$ 144	$ 204
Gross Amount of Eligible Offsetting Recognized Derivative Liabilities	(28)	(105)
Cash Collateral Received	0	0
Net Amount of Derivative Assets	116	99
Offsetting of Financial Liabilities under Master Netting Agreements [Abstract]
Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet	(66)	(136)
Gross Amount of Eligible Offsetting Recognized Derivative Assets	28	105
Cash Collateral Pledged	0	0
Net Amount of Derivative Liabilities	$ (38)	$ (31)