Long-Term Debt (Summary of Long-Term Debt) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Long-term debt	$ 26,233	$ 26,680
Less current portion of long-term debt	1,121	1,556
Long-term debt excluding current portion	25,112	25,124
Notes 2.350% To 10.20%, interest payable semi-annually, due through 2061 [Member] | Notes [Member]
Debt Instrument [Line Items]
Long-term debt	$ 22,888	$ 22,098
Notes 2.350% To 10.20%, interest payable semi-annually, due through 2061 [Member] | Notes [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate	2.35%
Notes 2.350% To 10.20%, interest payable semi-annually, due through 2061 [Member] | Notes [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate	10.20%
Notes 2.350% To 10.20%, interest payable semi-annually, due through 2061 [Member] | Notes [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Weighted average interest rate	4.50%	4.40%
USD Debenture, 7.750%, Maturing January 2027 [Member] | Debenture [Member]
Debt Instrument [Line Items]
Long-term debt	$ 42	$ 42
Interest Rate	7.75%
Euro notes, 1.000% to 3.125%, interest payable annually, due through 2031 [Member] | Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3,303	$ 4,540
Euro notes, 1.000% to 3.125%, interest payable annually, due through 2031 [Member] | Notes Payable, Other Payables [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest Rate	1.70%
Euro notes, 1.000% to 3.125%, interest payable annually, due through 2031 [Member] | Notes Payable, Other Payables [Member] | Maximum [Member]
Debt Instrument [Line Items]
Interest Rate	3.125%
Euro notes, 1.000% to 3.125%, interest payable annually, due through 2031 [Member] | Notes Payable, Other Payables [Member] | Weighted Average [Member]
Debt Instrument [Line Items]
Weighted average interest rate	2.50%	2.00%