Fair Value Measurements and Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets:
Total	$ 790	$ 1,527
Other liabilities:
Total	8,685	3,180
Fixed income securities | Prepaid expenses and other
Assets:
Debt securities, available-for-sale	37	18
Fixed income securities | Other assets
Assets:
Debt securities, available-for-sale	349	391
Interest rate swaps | Prepaid expenses and other
Assets:
Derivative asset		188
Interest rate swaps | Other assets
Assets:
Derivative asset		285
Interest rate swaps | Other current liabilities
Other liabilities:
Derivative liabilities	731	1
Interest rate swaps | Other liabilities
Other liabilities:
Derivative liabilities	3,902	665
Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	42	9
Cross currency swaps | Other assets
Assets:
Derivative asset	263	580
Cross currency swaps | Other current liabilities
Other liabilities:
Derivative liabilities	346	218
Cross currency swaps | Other liabilities
Other liabilities:
Derivative liabilities	3,295	1,406
Foreign exchange forwards
Assets:
Derivative asset	6	12
Other liabilities:
Derivative liabilities	1
Forward starting interest rate swaps
Other liabilities:
Derivative liabilities		302
Interest rate caps
Assets:
Derivative asset		44
Other liabilities:
Derivative liabilities		44
Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	63
Interest rate caps | Other assets
Assets:
Derivative asset	30
Interest rate caps | Other current liabilities
Other liabilities:
Derivative liabilities	63
Interest rate caps | Other liabilities
Other liabilities:
Derivative liabilities	30
Contingent consideration | Other current liabilities
Other liabilities:
Derivative liabilities	274	231
Contingent consideration | Other liabilities
Other liabilities:
Derivative liabilities	43	313
Level 1
Assets:
Total	0	0
Other liabilities:
Total	0	0
Level 1 | Fixed income securities | Prepaid expenses and other
Assets:
Debt securities, available-for-sale	0	0
Level 1 | Fixed income securities | Other assets
Assets:
Debt securities, available-for-sale	0	0
Level 1 | Interest rate swaps | Prepaid expenses and other
Assets:
Derivative asset		0
Level 1 | Interest rate swaps | Other assets
Assets:
Derivative asset		0
Level 1 | Interest rate swaps | Other current liabilities
Other liabilities:
Derivative liabilities	0	0
Level 1 | Interest rate swaps | Other liabilities
Other 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
Other liabilities:
Derivative liabilities	0	0
Level 1 | Cross currency swaps | Other liabilities
Other liabilities:
Derivative liabilities	0	0
Level 1 | Foreign exchange forwards
Assets:
Derivative asset	0	0
Other liabilities:
Derivative liabilities	0
Level 1 | Forward starting interest rate swaps
Other liabilities:
Derivative liabilities		0
Level 1 | Interest rate caps
Assets:
Derivative asset		0
Other liabilities:
Derivative liabilities		0
Level 1 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	0
Level 1 | Interest rate caps | Other assets
Assets:
Derivative asset	0
Level 1 | Interest rate caps | Other current liabilities
Other liabilities:
Derivative liabilities	0
Level 1 | Interest rate caps | Other liabilities
Other liabilities:
Derivative liabilities	0
Level 1 | Contingent consideration | Other current liabilities
Other liabilities:
Derivative liabilities	0	0
Level 1 | Contingent consideration | Other liabilities
Other liabilities:
Derivative liabilities	0	0
Level 2
Assets:
Total	790	1,527
Other liabilities:
Total	8,368	2,636
Level 2 | Fixed income securities | Prepaid expenses and other
Assets:
Debt securities, available-for-sale	37	18
Level 2 | Fixed income securities | Other assets
Assets:
Debt securities, available-for-sale	349	391
Level 2 | Interest rate swaps | Prepaid expenses and other
Assets:
Derivative asset		188
Level 2 | Interest rate swaps | Other assets
Assets:
Derivative asset		285
Level 2 | Interest rate swaps | Other current liabilities
Other liabilities:
Derivative liabilities	731	1
Level 2 | Interest rate swaps | Other liabilities
Other liabilities:
Derivative liabilities	3,902	665
Level 2 | Cross currency swaps | Prepaid expenses and other
Assets:
Derivative asset	42	9
Level 2 | Cross currency swaps | Other assets
Assets:
Derivative asset	263	580
Level 2 | Cross currency swaps | Other current liabilities
Other liabilities:
Derivative liabilities	346	218
Level 2 | Cross currency swaps | Other liabilities
Other liabilities:
Derivative liabilities	3,295	1,406
Level 2 | Foreign exchange forwards
Assets:
Derivative asset	6	12
Other liabilities:
Derivative liabilities	1
Level 2 | Forward starting interest rate swaps
Other liabilities:
Derivative liabilities		302
Level 2 | Interest rate caps
Assets:
Derivative asset		44
Other liabilities:
Derivative liabilities		44
Level 2 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	63
Level 2 | Interest rate caps | Other assets
Assets:
Derivative asset	30
Level 2 | Interest rate caps | Other current liabilities
Other liabilities:
Derivative liabilities	63
Level 2 | Interest rate caps | Other liabilities
Other liabilities:
Derivative liabilities	30
Level 2 | Contingent consideration | Other current liabilities
Other liabilities:
Derivative liabilities	0	0
Level 2 | Contingent consideration | Other liabilities
Other liabilities:
Derivative liabilities	0	0
Level 3
Assets:
Total	0	0
Other liabilities:
Total	317	544
Level 3 | Fixed income securities | Prepaid expenses and other
Assets:
Debt securities, available-for-sale	0	0
Level 3 | Fixed income securities | Other assets
Assets:
Debt securities, available-for-sale	0	0
Level 3 | Interest rate swaps | Prepaid expenses and other
Assets:
Derivative asset		0
Level 3 | Interest rate swaps | Other assets
Assets:
Derivative asset		0
Level 3 | Interest rate swaps | Other current liabilities
Other liabilities:
Derivative liabilities	0	0
Level 3 | Interest rate swaps | Other liabilities
Other 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
Other liabilities:
Derivative liabilities	0	0
Level 3 | Cross currency swaps | Other liabilities
Other liabilities:
Derivative liabilities	0	0
Level 3 | Foreign exchange forwards
Assets:
Derivative asset	0	0
Other liabilities:
Derivative liabilities	0
Level 3 | Forward starting interest rate swaps
Other liabilities:
Derivative liabilities		0
Level 3 | Interest rate caps
Assets:
Derivative asset		0
Other liabilities:
Derivative liabilities		0
Level 3 | Interest rate caps | Prepaid expenses and other
Assets:
Derivative asset	0
Level 3 | Interest rate caps | Other assets
Assets:
Derivative asset	0
Level 3 | Interest rate caps | Other current liabilities
Other liabilities:
Derivative liabilities	0
Level 3 | Interest rate caps | Other liabilities
Other liabilities:
Derivative liabilities	0
Level 3 | Contingent consideration | Other current liabilities
Other liabilities:
Derivative liabilities	274	231
Level 3 | Contingent consideration | Other liabilities
Other liabilities:
Derivative liabilities	$ 43	$ 313