Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Assets:
Derivative instruments	$ 271	$ 591
Liabilities:
Derivative instruments	335	72
Allowance for credit losses	0
Fair Value, Recurring
Assets:
Loan receivable	328	280
Derivative instruments	271	591
Total	4,182	3,914
Liabilities:
Derivative instruments	335	72
Mortgage and loans payable	720	654
Senior notes	16,182	13,342
Total	17,237	14,068
Fair Value, Recurring \| Money market funds
Assets:
Money market funds	2,517	2,401
Fair Value, Recurring \| Time deposits
Assets:
Money market funds	1,016	642
Fair Value, Recurring \| U.S. government securities
Assets:
Money market funds	50	0
Level 1 \| Fair Value, Recurring
Assets:
Loan receivable	0	0
Derivative instruments	0	0
Total	2,761	2,516
Liabilities:
Derivative instruments	0	0
Mortgage and loans payable	0	0
Senior notes	15,671	12,851
Total	15,671	12,851
Level 1 \| Fair Value, Recurring \| Money market funds
Assets:
Money market funds	2,517	2,401
Level 1 \| Fair Value, Recurring \| Time deposits
Assets:
Money market funds	194	115
Level 1 \| Fair Value, Recurring \| U.S. government securities
Assets:
Money market funds	50	0
Level 2 \| Fair Value, Recurring
Assets:
Loan receivable	0	0
Derivative instruments	271	591
Total	1,093	1,118
Liabilities:
Derivative instruments	335	72
Mortgage and loans payable	720	654
Senior notes	511	491
Total	1,566	1,217
Level 2 \| Fair Value, Recurring \| Money market funds
Assets:
Money market funds	0	0
Level 2 \| Fair Value, Recurring \| Time deposits
Assets:
Money market funds	822	527
Level 2 \| Fair Value, Recurring \| U.S. government securities
Assets:
Money market funds	0	0
Level 3 \| Fair Value, Recurring
Assets:
Loan receivable	328	280
Derivative instruments	0	0
Total	328	280
Liabilities:
Derivative instruments	0	0
Mortgage and loans payable	0	0
Senior notes	0	0
Total	0	0
Level 3 \| Fair Value, Recurring \| Money market funds
Assets:
Money market funds	0	0
Level 3 \| Fair Value, Recurring \| Time deposits
Assets:
Money market funds	0	0
Level 3 \| Fair Value, Recurring \| U.S. government securities
Assets:
Money market funds	$ 0	$ 0

Fair value portion of asset recognized for present right to economic benefit.

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