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Long-Term Debt and Short-Term Borrowings - Revolving Credit Facility - Additional Information (Detail) - USD ($) | 12 Months Ended |
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Dec. 31, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |
Letters of credit outstanding amount | $ 50,900,000 |
2015 Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Amounts available to borrow under Credit Agreement | $ 2,800,000,000 |
Revolving credit sub-facilities current borrowings capacity foreign currency fluctuation provision | 5.00% |
2015 Credit Agreement [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Credit Agreement applicable fixed rate spread | 0.85% |
2015 Credit Agreement [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Credit Agreement applicable fixed rate spread | 1.00% |
2015 Credit Agreement [Member] | Canadian subsidiaries [Member] |  |
Debt Instrument [Line Items] |  |
Amounts available to borrow under Credit Agreement | $ 75,000,000 |
2015 Credit Agreement [Member] | Australian and New Zealand subsidiaries [Member] |  |
Debt Instrument [Line Items] |  |
Amounts available to borrow under Credit Agreement | 100,000,000 |
2015 Credit Agreement [Member] | U.K. subsidiaries [Member] |  |
Debt Instrument [Line Items] |  |
Amounts available to borrow under Credit Agreement | 300,000,000 |
Revolving credit facility [Member] |  |
Debt Instrument [Line Items] |  |
Letters of credit outstanding amount |  | $ 2,000,000
Revolving credit facility principal amount outstanding | $ 0 | 0
Revolving credit facility [Member] | 2015 Credit Agreement [Member] |  |
Debt Instrument [Line Items] |  |
Amounts available to borrow under Credit Agreement |  | $ 2,600,000,000

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- Definition The interest rate spread applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a certain spread in addition to a set, unchanging fixed rate. + References No definition available. + Details
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- Definition Percentage increase over the borrowing capacity allowed under foreign currency fluctuation provision. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(13)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Line-of-Credit Arrangement -URI http://asc.fasb.org/extlink&oid=6517033 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(19)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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