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Debt - Long-term Debt (Detail) - USD ($) $ in Millions	Dec. 31, 2020	Nov. 02, 2020	Sep. 30, 2020	Aug. 12, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 3,387		$ 3,104
3.000% Senior Secured Notes due 2031
Debt Instrument [Line Items]
Interest rate	3.00%				3.00%
Acquisition Corp. | Senior Term Loan Facility due 2023
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 815		814
Acquisition Corp. | 3.625% Senior Secured Notes due 2026
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 545		521
Interest rate	3.625%
Acquisition Corp. | 2.750% Senior Secured Notes due 2028
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 392		375
Interest rate	2.75%
Acquisition Corp. | 3.875% Senior Secured Notes due 2030
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 529		529
Interest rate	3.875%
Acquisition Corp. | 3.000% Senior Secured Notes due 2031
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 784		544
Interest rate	3.00%	3.00%		3.00%
Acquisition Corp. | 5.500% Senior Notes due 2026
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 322		321
Interest rate	5.50%
Acquisition Corp. | Revolving Credit Facility
Debt Instrument [Line Items]
Total long-term debt, including the current portion	$ 0		$ 0

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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