Debt (Schedule of Long-Term Debt) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022
Long-Term Debt
Total debt	[1]	$ 21,995	$ 23,822
Less: unamortized debt issuance costs		(543)	(431)
Total debt, net of unamortized debt issuance costs		21,452	23,391
Less—current portion		(1,720)	(2,088)
Long-term portion		$ 19,732	$ 21,303
Weighted average interest rate		6.06%	6.23%
Fixed rate debt:
Long-Term Debt
Long-term debt		$ 16,618	$ 15,856
Unsecured senior notes
Long-Term Debt
Long-term debt		7,899	7,199
Secured senior notes
Long-Term Debt
Long-term debt		1,000	2,371
Unsecured term loans
Long-Term Debt
Long-term debt		6,569	4,561
Convertible notes
Long-Term Debt
Long-term debt		1,150	1,725
Total variable rate debt
Long-Term Debt
Long-term debt	[2]	5,008	7,615
Unsecured revolving credit facilities
Long-Term Debt
Long-term debt	[2],[3]	$ 899	2,744
Unsecured revolving credit facilities | Unsecured Revolving Credit Facility Due 2024, $1.9 billion
Long-Term Debt
Long term debt, facility fee (as a percent)		0.20%
USD unsecured term loans
Long-Term Debt
Long-term debt	[2]	$ 3,666	4,336
Euro unsecured term loans
Long-Term Debt
Long-term debt	[2]	443	535
Finance lease liabilities
Long-Term Debt
Long-term debt		$ 369	$ 351
Term SOFR | Unsecured revolving credit facilities | Unsecured Revolving Credit Facility Due 2024, $1.9 billion
Long-Term Debt
Credit adjustment spread		0.10%
Margin on floating rate base (as a percent)		1.80%
Minimum | Unsecured senior notes
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	3.70%
Minimum | Secured senior notes
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	8.25%
Minimum | Unsecured term loans
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	1.28%
Minimum | Convertible notes
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	6.00%
Minimum | Unsecured revolving credit facilities
Long-Term Debt
Long term debt, current interest rate (as a percent)	[2],[3],[4]	7.25%
Minimum | USD unsecured term loans
Long-Term Debt
Long term debt, current interest rate (as a percent)	[2],[4]	5.99%
Minimum | Euro unsecured term loans
Long-Term Debt
Long term debt, current interest rate (as a percent)	[2],[4]	5.26%
Maximum | Unsecured senior notes
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	11.63%
Maximum | Unsecured term loans
Long-Term Debt
Long term debt, stated interest rate (as a percent)	[4]	5.89%
Maximum | Unsecured revolving credit facilities
Long-Term Debt
Long term debt, current interest rate (as a percent)	[3],[4]	7.50%
Maximum | USD unsecured term loans
Long-Term Debt
Long term debt, current interest rate (as a percent)	[2],[4]	9.98%
Maximum | Euro unsecured term loans
Long-Term Debt
Long term debt, current interest rate (as a percent)	[2],[4]	6.10%

[1] At December 31, 2023 and 2022, the weighted average interest rate for total debt was 6.06% and 6.23%, respectively.

[2] During the year ended December 31, 2023, we completed our transition from LIBOR to Term SOFR rates for all of our variable rate facilities, with such transition having taken effect at the interest reset date for each such facility.

[3] Advances under our unsecured revolving credit facilities accrue interest at Term SOFR plus a 0.10% credit adjustment spread plus an interest rate margin primarily at 1.80%. Based on applicable Term SOFR rates, as of December 31, 2023, the maximum interest rate under the unsecured credit facilities was 7.50%. We also pay a facility fee primarily at 0.20% of the total commitments under such facility.

[4] Interest rates based on outstanding loan balance as of December 31, 2023, and for variable rate debt, includes either EURIBOR or Term SOFR plus the applicable margin.