Fair Value Measurements (Fair Value Hierarchy) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities held in trusts	$ 774	$ 965
Derivative Assets	84	70
Derivative Liability	386	213
Marketable securities held in trusts	774	965
Level 1 | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities held in trusts	713	890
Derivative Assets	0	0
Derivative Liability	0	0
Level 2 | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities held in trusts	61	75
Derivative Assets	84	70
Derivative Liability	386	213
Level 3 | Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities held in trusts	0	0
Derivative Assets	0	0
Derivative Liability	$ 0	$ 0