Fair Value Measurements and Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Assets:
Total	$ 867	$ 790
Liabilities:
Contingent consideration	202
Total	7,816	8,685
Other current liabilities
Liabilities:
Contingent consideration		274
Other liabilities
Liabilities:
Contingent consideration		43
Fixed income securities | Prepaid expenses and other
Assets:
Fixed income securities	41	37
Fixed income securities | Other assets
Assets:
Fixed income securities	269	349
Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	885	731
Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	3,666	3,902
Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	4	42
Cross currency swaps | Other assets
Assets:
Derivative asset	455	263
Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	354	346
Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	2,607	3,295
Foreign exchange forwards
Assets:
Derivative asset	1	6
Liabilities:
Derivative liabilities	5	1
Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	76	63
Interest rate caps | Other assets
Assets:
Derivative asset	21	30
Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	76	63
Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	21	30
Level 1
Assets:
Total	0	0
Liabilities:
Contingent consideration	0
Total	0	0
Level 1 | Other current liabilities
Liabilities:
Contingent consideration		0
Level 1 | Other liabilities
Liabilities:
Contingent consideration		0
Level 1 | Fixed income securities | Prepaid expenses and other
Assets:
Fixed income securities	0	0
Level 1 | Fixed income securities | Other assets
Assets:
Fixed income securities	0	0
Level 1 | Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 1 | Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	0	0
Level 1 | Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	0	0
Level 1 | Cross currency swaps | Other assets
Assets:
Derivative asset	0	0
Level 1 | Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 1 | Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	0	0
Level 1 | Foreign exchange forwards
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Level 1 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	0	0
Level 1 | Interest rate caps | Other assets
Assets:
Derivative asset	0	0
Level 1 | Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 1 | Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	0	0
Level 2
Assets:
Total	867	790
Liabilities:
Contingent consideration	0
Total	7,614	8,368
Level 2 | Other current liabilities
Liabilities:
Contingent consideration		0
Level 2 | Other liabilities
Liabilities:
Contingent consideration		0
Level 2 | Fixed income securities | Prepaid expenses and other
Assets:
Fixed income securities	41	37
Level 2 | Fixed income securities | Other assets
Assets:
Fixed income securities	269	349
Level 2 | Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	885	731
Level 2 | Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	3,666	3,902
Level 2 | Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	4	42
Level 2 | Cross currency swaps | Other assets
Assets:
Derivative asset	455	263
Level 2 | Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	354	346
Level 2 | Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	2,607	3,295
Level 2 | Foreign exchange forwards
Assets:
Derivative asset	1	6
Liabilities:
Derivative liabilities	5	1
Level 2 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	76	63
Level 2 | Interest rate caps | Other assets
Assets:
Derivative asset	21	30
Level 2 | Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	76	63
Level 2 | Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	21	30
Level 3
Assets:
Total	0	0
Liabilities:
Contingent consideration	202
Total	202	317
Level 3 | Other current liabilities
Liabilities:
Contingent consideration		274
Level 3 | Other liabilities
Liabilities:
Contingent consideration		43
Level 3 | Fixed income securities | Prepaid expenses and other
Assets:
Fixed income securities	0	0
Level 3 | Fixed income securities | Other assets
Assets:
Fixed income securities	0	0
Level 3 | Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 3 | Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	0	0
Level 3 | Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	0	0
Level 3 | Cross currency swaps | Other assets
Assets:
Derivative asset	0	0
Level 3 | Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 3 | Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	0	0
Level 3 | Foreign exchange forwards
Assets:
Derivative asset	0	0
Liabilities:
Derivative liabilities	0	0
Level 3 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	0	0
Level 3 | Interest rate caps | Other assets
Assets:
Derivative asset	0	0
Level 3 | Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	0	0
Level 3 | Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	$ 0	$ 0