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