Fair Value Measurements and Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Assets:
Total	$ 865	$ 788
Liabilities:
Total	7,233	7,999
Fixed income securities
Assets:
Debt securities, available-for-sale, current	26	16
Debt securities, available-for-sale, noncurrent	307	269
Foreign exchange forwards
Assets:
Derivative asset, current	3
Liabilities:
Derivative liability, current	1	5
Interest rate caps
Assets:
Derivative asset, current	1	3
Liabilities:
Derivative liability, current	1	3
Cross currency swaps
Assets:
Derivative asset, noncurrent	528	500
Liabilities:
Derivative liability, current	332	345
Derivative liability, noncurrent	2,081	2,344
Interest rate swaps
Liabilities:
Derivative liability, current	1,932	1,964
Derivative liability, noncurrent	2,886	3,338
Level 1
Assets:
Total	0	0
Liabilities:
Total	0	0
Level 1 | Fixed income securities
Assets:
Debt securities, available-for-sale, current	0	0
Debt securities, available-for-sale, noncurrent	0	0
Level 1 | Foreign exchange forwards
Assets:
Derivative asset, current	0
Liabilities:
Derivative liability, current	0	0
Level 1 | Interest rate caps
Assets:
Derivative asset, current	0	0
Liabilities:
Derivative liability, current	0	0
Level 1 | Cross currency swaps
Assets:
Derivative asset, noncurrent	0	0
Liabilities:
Derivative liability, current	0	0
Derivative liability, noncurrent	0	0
Level 1 | Interest rate swaps
Liabilities:
Derivative liability, current	0	0
Derivative liability, noncurrent	0	0
Level 2
Assets:
Total	865	788
Liabilities:
Total	7,233	7,999
Level 2 | Fixed income securities
Assets:
Debt securities, available-for-sale, current	26	16
Debt securities, available-for-sale, noncurrent	307	269
Level 2 | Foreign exchange forwards
Assets:
Derivative asset, current	3
Liabilities:
Derivative liability, current	1	5
Level 2 | Interest rate caps
Assets:
Derivative asset, current	1	3
Liabilities:
Derivative liability, current	1	3
Level 2 | Cross currency swaps
Assets:
Derivative asset, noncurrent	528	500
Liabilities:
Derivative liability, current	332	345
Derivative liability, noncurrent	2,081	2,344
Level 2 | Interest rate swaps
Liabilities:
Derivative liability, current	1,932	1,964
Derivative liability, noncurrent	2,886	3,338
Level 3
Assets:
Total	0	0
Liabilities:
Total	0	0
Level 3 | Fixed income securities
Assets:
Debt securities, available-for-sale, current	0	0
Debt securities, available-for-sale, noncurrent	0	0
Level 3 | Foreign exchange forwards
Assets:
Derivative asset, current	0
Liabilities:
Derivative liability, current	0	0
Level 3 | Interest rate caps
Assets:
Derivative asset, current	0	0
Liabilities:
Derivative liability, current	0	0
Level 3 | Cross currency swaps
Assets:
Derivative asset, noncurrent	0	0
Liabilities:
Derivative liability, current	0	0
Derivative liability, noncurrent	0	0
Level 3 | Interest rate swaps
Liabilities:
Derivative liability, current	0	0
Derivative liability, noncurrent	$ 0	$ 0