Long-term Debt and Other Financing Arrangements - Summary of Long-Term Debt (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	4.24%	4.04%
Total long-term debt, Carrying Amount	$ 8,271	$ 7,763
Capital lease and other financing obligations, Carrying Amount	173	158
Bank overdrafts		5
Total debt and other financing arrangements	8,444	7,926
Less: Current portion of long-term debt, capital lease and other financing obligations and other short-term borrowings	67	188
Long-term debt and capital lease obligations	8,377	7,738
Total long-term debt, Fair Value	$ 8,449	$ 7,918
Senior secured credit facilities
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	3.21%	2.95%
Total long-term debt, Carrying Amount	$ 4,073	$ 4,059
Total long-term debt, Fair Value	$ 4,094	$ 4,109
Debenture loans
Debt Instrument [Line Items]
Total long-term debt, Weighted average interest rate	5.22%	5.22%
Total long-term debt, Carrying Amount	$ 4,197	$ 3,697
Total long-term debt, Fair Value	4,354	3,802
Senior Secured Term Loan Facility Due 2019 | Libor Based Variable Rate of 3.24%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	1,391	1,768
Total long-term debt, Fair Value	1,398	1,785
Senior Secured Term Loan Facility Due 2023 | Libor Based Variable Rate of 3.24%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	2,237
Total long-term debt, Fair Value	2,247
Senior Secured Term Loan Facility Due 2023 | Libor Based Variable Rate of 3.15%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount		1,892
Total long-term debt, Fair Value		1,922
Senior Secured Term Loan Facility Due 2021 | Euro Libor Based Variable Rate of 2.10%
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	445	399
Total long-term debt, Fair Value	449	402
Senior Debenture Loan Due 2020
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	795	794
Total long-term debt, Fair Value	809	813
Senior debenture loan due 2021
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	619	618
Total long-term debt, Fair Value	643	649
Senior Debenture Loan Due 2022
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	2,288	2,285
Total long-term debt, Fair Value	2,382	2,340
Senior Debenture Loan Due 2025
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	495
Total long-term debt, Fair Value	520
Other Loans
Debt Instrument [Line Items]
Total long-term debt, Carrying Amount	1	7
Total long-term debt, Fair Value	$ 1	$ 7