Debt (Detail) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
		Sep. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total debt		$ 5,858.1	$ 5,058.9
Less: current portion		(545.0)	(594.9)
Total long-term debt		5,313.1	4,464.0
Senior Secured Credit Facility Term Loans
Debt Instrument [Line Items]
Total debt		2,884.2	2,024.6
6 1/8% Senior Notes Due 2022
Debt Instrument [Line Items]
Total debt	[1]	$ 300.0	$ 300.0
Interest rate of debt instrument		6.125%	6.125%
Debt instrument maturity year		2022	2022
3 3/4% Senior Notes Due 2021
Debt Instrument [Line Items]
Total debt	[1]	$ 331.6	$ 357.9
Interest rate of debt instrument		3.75%	3.75%
Debt instrument maturity year		2021	2021
7 1/2% Senior Subordinated Notes Due 2017
Debt Instrument [Line Items]
Total debt	[2]	$ 655.2	$ 650.6
Interest rate of debt instrument		7.50%	7.50%
Debt instrument maturity year		2017	2017
1 7/8% Senior Subordinated Convertible Notes Due 2018
Debt Instrument [Line Items]
Total debt	[3]	$ 455.9	$ 445.8
Interest rate of debt instrument		1.875%	1.875%
Debt instrument maturity year		2018	2018
1 1/2% Senior Subordinated Convertible Notes Due 2019
Debt Instrument [Line Items]
Total debt	[3]	$ 231.9	$ 226.0
Interest rate of debt instrument		1.50%	1.50%
Debt instrument maturity year		2019	2019
1 1/8% Senior Subordinated Convertible Notes due 2034
Debt Instrument [Line Items]
Total debt	[3]	$ 497.3	$ 484.1
Interest rate of debt instrument		1.125%	1.125%
Debt instrument maturity year		2034	2034
Securitization Facility
Debt Instrument [Line Items]
Total debt		$ 444.7	$ 479.3
Non-U.S. Borrowings
Debt Instrument [Line Items]
Total debt		48.2	83.2
Other
Debt Instrument [Line Items]
Total debt		$ 9.1	$ 7.4

[1] Collectively, the "Senior Notes."

[2] The "Senior Subordinated Notes."

[3] Collectively, the "Senior Subordinated Convertible Notes."