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Fair Value Measurements and Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Assets:    
Total $ 930 $ 1,089
Liabilities:    
Contingent consideration   52
Total 7,317 6,653
Fixed income securities    
Assets:    
Debt securities, available-for-sale, current 19 25
Debt securities, available-for-sale, noncurrent 265 254
Cross currency swaps    
Assets:    
Derivative asset, current 2 4
Derivative asset, noncurrent 598 758
Liabilities:    
Derivative liability, current 351 294
Derivative liability, noncurrent 1,816 1,791
Interest rate swaps    
Liabilities:    
Derivative liability, current 1,670 823
Derivative liability, noncurrent 3,424 3,648
Foreign exchange forwards    
Assets:    
Derivative asset, current   4
Liabilities:    
Derivative liability, current 10 1
Interest rate caps    
Assets:    
Derivative asset, current 41 37
Derivative asset, noncurrent 5 7
Liabilities:    
Derivative liability, current 41 37
Derivative liability, noncurrent 5 7
Level 1    
Assets:    
Total 0 0
Liabilities:    
Contingent consideration   0
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 | Cross currency swaps    
Assets:    
Derivative asset, current 0 0
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 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
Derivative asset, noncurrent 0 0
Liabilities:    
Derivative liability, current 0 0
Derivative liability, noncurrent 0 0
Level 2    
Assets:    
Total 930 1,089
Liabilities:    
Contingent consideration   0
Total 7,317 6,601
Level 2 | Fixed income securities    
Assets:    
Debt securities, available-for-sale, current 19 25
Debt securities, available-for-sale, noncurrent 265 254
Level 2 | Cross currency swaps    
Assets:    
Derivative asset, current 2 4
Derivative asset, noncurrent 598 758
Liabilities:    
Derivative liability, current 351 294
Derivative liability, noncurrent 1,816 1,791
Level 2 | Interest rate swaps    
Liabilities:    
Derivative liability, current 1,670 823
Derivative liability, noncurrent 3,424 3,648
Level 2 | Foreign exchange forwards    
Assets:    
Derivative asset, current   4
Liabilities:    
Derivative liability, current 10 1
Level 2 | Interest rate caps    
Assets:    
Derivative asset, current 41 37
Derivative asset, noncurrent 5 7
Liabilities:    
Derivative liability, current 41 37
Derivative liability, noncurrent 5 7
Level 3    
Assets:    
Total 0 0
Liabilities:    
Contingent consideration   52
Total 0 52
Level 3 | Fixed income securities    
Assets:    
Debt securities, available-for-sale, current 0 0
Debt securities, available-for-sale, noncurrent 0 0
Level 3 | Cross currency swaps    
Assets:    
Derivative asset, current 0 0
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
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
Derivative asset, noncurrent 0 0
Liabilities:    
Derivative liability, current 0 0
Derivative liability, noncurrent $ 0 $ 0