Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Consolidated leverage ratio.

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Debt instrument principal amount issuance percentage.

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Debt instrument yield percentage.

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Interest rate margin adjustment percentage.

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Line of credit facility maturity month and year.

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Rate adjustment to federal funds rate weighted average.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of the required periodic payments applied to principal.

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Average fixed interest rate related to the group of interest rate derivatives.

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Fixed interest rate related to the interest rate derivative.

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The increase (decrease) during the reporting period of all assets and liabilities used in operating activities.

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Fair value as of the balance sheet date of all interest rate derivatives designated as cash flow hedging instruments.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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This is the principal amount outstanding for securitized loans only (across all types of loans).

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Long-term debt, Cash Flow Hedges and Foreign Currency Forward Exchange Contracts - Additional Information (Detail)			1 Months Ended	3 Months Ended				9 Months Ended		12 Months Ended
	Jun. 07, 2016 USD ($)	May 31, 2015 USD ($) Derivative	Jun. 30, 2016 USD ($)	Dec. 31, 2015 USD ($) Derivative	Sep. 30, 2015 USD ($) Derivative	Jun. 30, 2015 USD ($) Derivative	Dec. 31, 2014 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($) Derivative	Jul. 31, 2017 USD ($)	Jun. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jun. 03, 2016 USD ($)	Aug. 07, 2014 USD ($)
Debt Instrument [Line Items]
Line of credit facility, starting date	Jun. 07, 2016
Line of credit facility, maturity month	2019-08
Rate adjustment to weighted average federal funds rate for credit facility borrowings								0.50%
Rate adjustment to one month Eurodollar rate on credit facility borrowings								1.00%
Accounts receivable securitization program credit facility, borrowing capacity											$ 440,000,000	$ 400,000,000
Accounts receivable securitization program credit facility, amount outstanding								$ 435,000,000
Accounts receivable securitization program credit facility, available borrowing capacity								5,000,000
Reduction of long-term debt								143,526,000	$ 814,971,000
Debt instrument carrying amount								4,000,000,000					$ 4,100,000,000
Fair value of debt								4,100,000,000					4,100,000,000
Number of additional forward starting interest rate swaps \| Derivative					4
Previously Outstanding Interest Rate Swaps
Debt Instrument [Line Items]
Maturity date of interest rate cash flow hedges		May 31, 2015
One Point Three One Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Maturity date of interest rate cash flow hedges										Apr. 15, 2019
Number of additional forward starting interest rate swaps \| Derivative										9
Fixed rate payable on interest rate swap				1.31%						1.31%
One Point Four Zero Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Maturity date of interest rate cash flow hedges						Apr. 15, 2019
Number of additional forward starting interest rate swaps \| Derivative						4
Average fixed rate payable on interest rate swap						1.40%
One Point Two Three Percent Forward Starting Interest Rate Swaps One
Debt Instrument [Line Items]
Maturity date of interest rate cash flow hedges					Apr. 15, 2019
Average fixed rate payable on interest rate swap					1.23%
One Point Two One Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Maturity date of interest rate cash flow hedges				Apr. 15, 2019
Number of additional forward starting interest rate swaps \| Derivative				1
Fixed rate payable on interest rate swap				1.21%						1.21%
Interest Rate Swap
Debt Instrument [Line Items]
Fair value of our interest rate swaps								4,000,000
Fair value of our interest rate swaps, assets													4,000,000
Fair value of our interest rate swaps, liability													$ 4,000,000
Interest Rate Swap \| Net Accounts Receivable
Debt Instrument [Line Items]
Fair value of our interest rate swaps, assets								1,000,000
Interest Rate Swap \| Other Assets
Debt Instrument [Line Items]
Fair value of our interest rate swaps, assets								3,000,000
Foreign Currency Forward Exchange Contracts
Debt Instrument [Line Items]
Net cash (outflows) inflows								$ (72,000,000)	$ 56,000,000
Cash Flow Hedging \| Previously Outstanding Interest Rate Swaps
Debt Instrument [Line Items]
Number of previously outstanding interest rate swaps \| Derivative		7
Notional amount of interest rate cash flow hedges		$ 825,000,000
Cash Flow Hedging \| One Point Three One Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges				$ 1,000,000,000						$ 1,000,000,000
Cash Flow Hedging \| One Point Four Zero Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges						$ 500,000,000
Cash Flow Hedging \| Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges					$ 400,000,000
Cash Flow Hedging \| One Point Two Three Percent Forward Starting Interest Rate Swaps One
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges					100,000,000
Cash Flow Hedging \| One Point Two Three Percent Forward Starting Interest Rate Swaps Two
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges					200,000,000
Cash Flow Hedging \| One Point Two Three Percent Forward Starting Interest Rate Swaps Three
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges					$ 100,000,000
Cash Flow Hedging \| One Point Two One Percent Forward Starting Interest Rate Swaps
Debt Instrument [Line Items]
Notional amount of interest rate cash flow hedges				$ 100,000,000						$ 100,000,000
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Line of credit facility, maturity month								2018-12
Senior Notes 7.125%
Debt Instrument [Line Items]
Senior notes, interest rate			7.125%
Senior notes, maturity date			Jun. 30, 2016
Reduction of long-term debt			$ 400,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity	$ 800,000,000							$ 800,000,000
Line of credit facility amount outstanding								$ 380,000,000
Current applicable margins								1.50%
Line of credit facility, available borrowing capacity								$ 366,000,000
Letters of credit, outstanding								33,000,000
Revolving Credit Facility \| Short Term on Demand Credit Facility
Debt Instrument [Line Items]
Line of credit facility amount outstanding								22,000,000
Revolving Credit Facility \| Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity								$ 125,000,000
Revolving Credit Facility \| ABR-based loans
Debt Instrument [Line Items]
Current applicable margins								0.50%
Revolving Credit Facility \| Minimum \| One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								0.50%
Revolving Credit Facility \| Minimum \| One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								1.50%
Revolving Credit Facility \| Maximum \| One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								1.25%
Revolving Credit Facility \| Maximum \| One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								2.25%
Term Loan A
Debt Instrument [Line Items]
Line of credit facility amount outstanding								$ 1,798,000,000
Line of credit facility increased amount	$ 200,000,000
Current applicable margins								1.50%
Term Loan A \| Quarterly installment payments made from the fourth quarter of 2014 through third quarter of 2016
Debt Instrument [Line Items]
Scheduled principal payments made							$ 11,000,000
Term Loan A \| Quarterly installment payments after September, 2016
Debt Instrument [Line Items]
Scheduled principal payments made								$ 22,000,000
Term Loan A \| ABR-based loans
Debt Instrument [Line Items]
Current applicable margins								0.50%
Term Loan A \| Minimum \| One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								0.50%
Term Loan A \| Minimum \| One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								1.50%
Term Loan A \| Maximum \| One Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								1.25%
Term Loan A \| Maximum \| One Two Three Six Month Eurodollar Rate Plus Index Based Loans
Debt Instrument [Line Items]
Consolidated Leverage Ratio								2.25%
New Senior Secured Notes
Debt Instrument [Line Items]
Senior notes, issued								$ 1,400,000,000
New Senior Secured Notes \| 3.75% Senior Secured Notes due August, 2019
Debt Instrument [Line Items]
Senior notes, issued															$ 300,000,000
Senior notes, interest rate															3.75%
Senior notes, maturity date								Aug. 01, 2019
New Senior Secured Notes \| 4.75% Senior Secured Notes due August, 2022
Debt Instrument [Line Items]
Senior notes, issued								$ 700,000,000						$ 400,000,000	$ 300,000,000
Senior notes, interest rate								4.75%
Senior notes issued percentage														101.50%
Senior notes yield percentage														4.35%
Senior notes, maturity date								Aug. 01, 2022
New Senior Secured Notes \| 5.00% Senior Secured Notes due June, 2026
Debt Instrument [Line Items]
Senior notes, issued														$ 400,000,000
Senior notes, interest rate														5.00%
Senior notes, maturity date								Jun. 01, 2026