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Long-Term Debt And Borrowing Arrangements (Narrative) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |
Document Period End Date |  | Jun. 30, 2016 |
Other Long-term Debt | $ 59 | $ 59 | $ 46
Deferred Finance Costs, Net | (53) | (53) | (55)
Long-term Debt | $ 3,530 | $ 3,530 | 3,461
Uncommitted Credit Facility [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 0.02% |  |
Uncommitted Credit Facility [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 4.50% |  |
Six And Three Over Eight Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | April 2024 |
Long-term Debt, Gross | $ 350 | $ 350 | 0
Six And Three Over Eight Senior Notes [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount | 350 | $ 350 |
Floating Rate Term Loan Due March Two Thousand Nineteen [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | March 2019 |
Long-term Debt, Gross | $ 144 | $ 144 | 970
Debt Instrument, Description of Variable Rate Basis | 225 basis points |  |
Five and One over Eight Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | June 2022 |
Long-term Debt, Gross | $ 400 | $ 400 | 400
Five And One Over Two Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | April 2023 |
Long-term Debt, Gross | 674 | $ 674 | 674
Four And Seven Over Eight Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | November 2017 |
Long-term Debt, Gross | 0 | $ 0 | 300
Four And Seven Over Eight Senior Notes [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Gross | 300 | 300 |
Repayments of Debt |  | $ 304 |
Floating Rate Term Loan Due March Two Thousand Twenty Two [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Maturity Date, Description |  | March 2022 |
Long-term Debt, Gross | $ 820 | $ 820 | $ 0
Debt Instrument, Description of Variable Rate Basis | 250 basis points |  |
Debt Instrument, Face Amount | $ 825 | $ 825 |
Debt Instrument, Basis Spread on Variable Rate | 4.21% | 2.50% |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.75% | 0.75% |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer. + 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) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 + Details
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