Debt (Narrative) (Detail) - USD ($)	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Apr. 15, 2014	Dec. 06, 2013
Line of Credit Facility [Line Items]
Letters of Credit Outstanding, Amount	$ 40,000,000				$ 37,000,000	$ 40,000,000
Amortization of original issue discount					2,000,000	2,000,000	$ 1,000,000
Loss on debt extinguishment	0	$ 0	$ 0	$ (11,000,000)	0	0	(24,000,000)
Debt Instrument, Unamortized Discount	8,000,000				6,000,000	8,000,000
Deferred Finance Costs, Net	$ 10,000,000				$ 7,000,000	$ 10,000,000
Weighted average cash interest rates	4.40%				4.30%	4.40%
Interest paid on debt					$ 139,000,000	$ 133,000,000	$ 111,000,000
Credit facility outstanding	$ 340,000,000				$ 345,000,000	$ 340,000,000
New Term Facilities [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Unamortized Discount								$ 11,000,000
Deferred Finance Costs, Net								12,000,000
New Tranche B Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Term						48 months
New Tranche C Term Loan [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Term						84 months
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Aggregate principal amount of credit facility in event of acceleration						$ 700,000,000
Number of days refinancing indebtedness will become due						91 days
Borrowing base									$ 600,000,000
Commitment Fee Percentage					0.375%
Borrowing base	550,000,000					$ 550,000,000
Revolving Credit Facility [Member] | Alternate Base Rate [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest					0.50%
Revolving Credit Facility [Member] | Alternate Base Rate [Member] | Maximum
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest					1.00%
Revolving Credit Facility [Member] | LIBOR [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest					1.50%
Revolving Credit Facility [Member] | LIBOR [Member] | Maximum
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest					2.00%
U.S. Line of Credit [Member]
Line of Credit Facility [Line Items]
Borrowing base	170,000,000				$ 213,000,000	170,000,000
Foreign Line of Credit [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	59,000,000				60,000,000	59,000,000
Standby Letters of Credit [Member]
Line of Credit Facility [Line Items]
Credit facility outstanding	$ 3,000,000				$ 8,000,000	$ 3,000,000
New Tranche B Term Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross								700,000,000
New Tranche B Term Loan [Member] | Revolving Credit Facility [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest						2.00%
New Tranche B Term Loan [Member] | Revolving Credit Facility [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest						3.00%
New Tranche B Term Loan [Member] | Revolving Credit Facility [Member] | LIBOR [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.00%					1.00%
New Tranche C Term Loan [Member]
Line of Credit Facility [Line Items]
Long-term Debt, Gross								$ 1,900,000,000
New Tranche C Term Loan [Member] | Revolving Credit Facility [Member] | Alternate Base Rate [Member]
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest						2.75%
New Tranche C Term Loan [Member] | Revolving Credit Facility [Member] | LIBOR [Member]
Line of Credit Facility [Line Items]
Debt Facilities term loans bear interest						3.75%
New Tranche C Term Loan [Member] | Revolving Credit Facility [Member] | LIBOR [Member] | Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	1.00%					1.00%