Fair Value Measurements and Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Assets:
Total	$ 726	$ 790
Liabilities:
Contingent consideration	218
Total	7,727	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	59	37
Fixed income securities | Other assets
Assets:
Fixed income securities	292	349
Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	862	731
Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	3,030	3,902
Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	47	42
Cross currency swaps | Other assets
Assets:
Derivative asset	252	263
Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	325	346
Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	3,216	3,295
Foreign exchange forwards
Assets:
Derivative asset	2	6
Liabilities:
Derivative liabilities	2	1
Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	58	63
Interest rate caps | Other assets
Assets:
Derivative asset	16	30
Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	58	63
Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	16	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	726	790
Liabilities:
Contingent consideration	0
Total	7,509	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	59	37
Level 2 | Fixed income securities | Other assets
Assets:
Fixed income securities	292	349
Level 2 | Interest rate swaps | Other current liabilities
Liabilities:
Derivative liabilities	862	731
Level 2 | Interest rate swaps | Other liabilities
Liabilities:
Derivative liabilities	3,030	3,902
Level 2 | Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	47	42
Level 2 | Cross currency swaps | Other assets
Assets:
Derivative asset	252	263
Level 2 | Cross currency swaps | Other current liabilities
Liabilities:
Derivative liabilities	325	346
Level 2 | Cross currency swaps | Other liabilities
Liabilities:
Derivative liabilities	3,216	3,295
Level 2 | Foreign exchange forwards
Assets:
Derivative asset	2	6
Liabilities:
Derivative liabilities	2	1
Level 2 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	58	63
Level 2 | Interest rate caps | Other assets
Assets:
Derivative asset	16	30
Level 2 | Interest rate caps | Other current liabilities
Liabilities:
Derivative liabilities	58	63
Level 2 | Interest rate caps | Other liabilities
Liabilities:
Derivative liabilities	16	30
Level 3
Assets:
Total	0	0
Liabilities:
Contingent consideration	218
Total	218	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