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Financial Instruments and Fair Value Measurement - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2015 USD ($) Derivative
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Cash and cash equivalents | $ 577,000,000 |  |  |
Other cash accounts | $ 581,000,000 |  |  |
Minimum |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Other cash accounts, variable interest rates | 0.20% |  |  |
Maximum |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Other cash accounts, variable interest rates | 0.25% |  |  |
One Point Three One Percent Forward Starting Interest Rate Swaps |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Number of additional forward starting interest rate swaps | Derivative |  |  |  | 9
Maturity date of interest rate cash flow hedges |  |  |  | Apr. 15, 2019
Fixed rate payable on interest rate swap |  |  |  | 1.31%
Interest Rate Swap |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Interest rate swaps | $ 0 |  |  |
Foreign Currency Forward Exchange Contracts |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Net cash (outflows) inflows | (22,000,000) | $ (20,000,000) | $ 66,000,000 |
Fair Value Hedge |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Fair value of hedges outstanding | $ 0 | $ 0 | $ 0 |
Cash Flow Hedging | One Point Three One Percent Forward Starting Interest Rate Swaps |  |  |  |
Financial Instruments And Fair Value Measurement [Line Items] |  |  |  |
Notional amount of interest rate cash flow hedges |  |  |  | $ 1,000,000,000.0

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References No definition available. + Details
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- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958 + Details
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