Long-term Debt and Other Financing Arrangements - Summary of Long-Term Debt (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	4.05%	4.04%
Total long-term debt, Carrying Amount	$ 7,520	$ 7,196
Capital lease and other financing obligations, Carrying Amount	140	142
Total debt and other financing arrangements	7,660	7,338
Less: Current portion of long-term debt, capital lease and other financing obligations and other short-term borrowings	189	310
Long-term debt and capital lease obligations	7,471	7,028
Total long-term debt, Fair Value	$ 7,634	$ 7,222
Senior secured credit facilities
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	2.90%	2.78%
Total long-term debt, Carrying Amount	$ 3,820	$ 3,496
Total long-term debt, Fair Value	$ 3,825	$ 3,497
Debenture loans
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	5.22%	5.22%
Total long-term debt, Carrying Amount	$ 3,693	$ 3,693
Total long-term debt, Fair Value	3,802	3,718
Senior Secured Term Loan Facility Due 2019 | Libor Based Variable Rate of 2.18%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount		1,455
Total long-term debt, Fair Value		1,454
Senior Secured Term Loan Facility Due 2019 | Libor Based Variable Rate of 2.44%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	1,933
Total long-term debt, Fair Value	1,932
Senior Secured Term Loan Facility Due 2019 | Euro LIBOR or LIBOR Based Variable Rate
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount		164
Total long-term debt, Fair Value		163
Senior Secured Term Loan Due 2017 | Libor Based Variable Rate
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	491	492
Total long-term debt, Fair Value	490	492
Senior Secured Term Loan Facility Due 2021 | Libor Based Variable Rate
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	1,077	1,080
Total long-term debt, Fair Value	1,083	1,082
Senior Secured Term Loan Facility Due 2021 | Euro Libor Based Variable Rate
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	319	305
Total long-term debt, Fair Value	320	306
Senior Debenture Loan Due 2020
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	792	792
Total long-term debt, Fair Value	818	808
Senior debenture loan due 2021
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	617	617
Total long-term debt, Fair Value	648	640
Senior Debenture Loan Due 2022
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	2,284	2,284
Total long-term debt, Fair Value	2,336	2,270
Other Loans
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	7	7
Total long-term debt, Fair Value	$ 7	$ 7