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Debt - Two Thousand Fifteen Credit Facility - Additional Information (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 26, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Dec. 20, 2011
Debt Instrument [Line Items] |  |  |  |  |  |
Borrowing capacity under Credit Facility |  |  |  |  |  | $ 600,000,000
Amount borrowed |  |  |  |  | $ 4,000,000 |
Repayments of Debt |  |  |  | $ 109,000,000 |  |
Total interest and commitments fees |  | $ 3,000,000 | $ 2,000,000 | 6,000,000 | $ 4,000,000 |
2015 Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total interest and commitments fees |  | $ 1,000,000 |  | $ 3,000,000 |  |
2015 Credit Facility | Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Borrowing capacity under Credit Facility | $ 1,000,000,000 |  |  |  |  |
Interest rate description |  |  |  | Any overdue amounts under or in respect of the revolving credit facility not paid when due shall bear interest at (i) in the case of principal, the applicable interest rate plus 2.00% per annum, (ii) in the case of interest denominated in Sterling or Euro, the applicable rate plus 2.00% per annum; and (iii) in the case of interest denominated in US Dollars, 2.00% per annum plus the Alternate Base Rate plus the interest rate spread applicable to ABR loans. |  |
Basis spread on variable rate |  |  |  | 2.00% |  |
Credit facility, maturity date |  |  |  | Jun. 26, 2020 |  |
Credit facility, expiration period |  |  |  | 5 years |  |
Amount borrowed | $ 290,000,000 |  |  |  |  |
Repayments of Debt |  |  |  | $ 109,000,000 |  |
Line Of Credit Facility Unused Capacity Commitment Fee Percentage |  |  |  | 0.20% |  |
2015 Credit Facility | Revolving Credit Facility | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 1.25% |  |
Borrowings, interest rate description |  |  |  | borrowings bear interest at LIBOR plus 125 basis points |  |
Borrowings, interest rate |  | 1.80% |  | 1.80% |  |
2015 Credit Facility | Revolving Credit Facility | GBP or EURO |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 2.00% |  |
2015 Credit Facility | Revolving Credit Facility | US Dollars |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Basis spread on variable rate |  |  |  | 2.00% |  |
2015 Credit Facility | Letter of Credit |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Borrowing capacity under Credit Facility |  | $ 15,000,000 |  | $ 15,000,000 |  |
Letters of credit outstanding amount |  | 2,000,000 |  | 2,000,000 |  |
2015 Credit Facility | Borrowings On Same Day Notice |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Borrowing capacity under Credit Facility |  | $ 40,000,000 |  | $ 40,000,000 |  |

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- Definition The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Date the credit facility terminates, in CCYY-MM-DD format. + 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 Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions). + 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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