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Long-Term Debt And Borrowing Arrangements (Narrative) (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2015 | Dec. 31, 2014
Debt Instrument [Line Items] |  |
Other Long-term Debt | $ 45 | $ 34
Long-term Debt | $ 3,532 | $ 3,420
Uncommitted Credit Facility [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Line of Credit Facility, Interest Rate During Period | 0.23% |
Uncommitted Credit Facility [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Line of Credit Facility, Interest Rate During Period | 2.84% |
Floating Rate Term Loan Due March Two Thousand Nineteen [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Maturity Date, Description | March 2019 |
Debt Instrument, Description of Variable Rate Basis | 225 basis points |
Floating Rate Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Description of Variable Rate Basis | 275 basis points |
Five and One over Eight Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Maturity Date, Description | June 2022 |
Five And One Over Four Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Maturity Date, Description | March 2025 |
Five And One Over Four Senior Notes [Member] | Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 375 |
Nine And Three Over Four Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Maturity Date, Description | March 2020 |
Nine And Three Over Four Senior Notes [Member] | Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Repurchased Face Amount | $ 223 |
Repayments of Long-term Debt | $ 243 |

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