Debt (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Total debt		$ 6,381.0	$ 5,058.9
Less: current portion		(593.5)	(594.9)
Total long-term debt		5,787.5	4,464.0
Senior Secured Credit Facility Term Loans
Debt Instrument [Line Items]
Total debt		3,067.6	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]	$ 321.8	$ 357.9
Interest rate of debt instrument		3.75%	3.75%
Debt instrument maturity year		2021	2021
5% Senior Notes Due 2023
Debt Instrument [Line Items]
Total debt	[1]	$ 300.0
Interest rate of debt instrument		5.00%	5.00%
Debt instrument maturity year		2023	2023
7 1/2% Senior Subordinated Notes Due 2017
Debt Instrument [Line Items]
Total debt	[2]	$ 654.6	$ 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]	$ 459.3	$ 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]	$ 234.0	$ 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]	$ 501.8	$ 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		$ 489.3	$ 479.3
Non-U.S. Borrowings
Debt Instrument [Line Items]
Total debt		40.3	83.2
Other
Debt Instrument [Line Items]
Total debt		$ 12.3	$ 7.4

[1] Collectively, the "Senior Notes"

[2] The "Senior Subordinated Notes"

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