Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities, net	$ (206.2)	$ (147.4)
Net change in short-term debt	4.2	88.9
Proceeds from issuance of long-term debt	253.0	300.2
Payments on long-term debt	(188.5)	(113.1)
Issuance (repurchase) of common stock, net	(264.8)	(435.3)
Excess tax benefits from stock-based compensation	2.2
Other	(5.1)	(5.1)
Net cash provided by (used in) financing activities	(199.0)	(164.4)
Additions to property, plant and equipment	(24.7)	(23.3)
Other	(1.9)
Net cash used in investing activities	(26.6)	(23.3)
Effect of exchange rate changes on cash	(22.3)	8.0
Net decrease in cash and cash equivalents	(454.1)	(327.1)
Cash and cash equivalents at beginning of period	1,034.1	808.3
Cash and cash equivalents at end of period	580.0	481.2
Parent Company
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities, net	(56.4)	(52.0)
(Payments on) proceeds from intercompany transactions	(146.2)	20.2
Proceeds from issuance of long-term debt	250.0	300.0
Payments on long-term debt	(187.7)	(110.1)
Issuance (repurchase) of common stock, net	(264.8)	(435.3)
Excess tax benefits from stock-based compensation	2.2
Other	(5.1)	(5.1)
Net cash provided by (used in) financing activities	(351.6)	(230.3)
Additions to property, plant and equipment	(0.1)	(2.7)
Other	(0.5)
Net cash used in investing activities	(0.6)	(2.7)
Net decrease in cash and cash equivalents	(408.6)	(285.0)
Cash and cash equivalents at beginning of period	560.2	335.4
Cash and cash equivalents at end of period	151.6	50.4
Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities, net	23.7	65.1
(Payments on) proceeds from intercompany transactions	(11.5)	(80.1)
Proceeds from issuance of long-term debt		0.2
Payments on long-term debt	(0.1)	(0.1)
Net cash provided by (used in) financing activities	(11.6)	(80.0)
Additions to property, plant and equipment	(13.8)	(13.0)
Other	0.6	1.0
Net cash used in investing activities	(13.2)	(12.0)
Net decrease in cash and cash equivalents	(1.1)	(26.9)
Cash and cash equivalents at beginning of period	5.0	28.7
Cash and cash equivalents at end of period	3.9	1.8
Non-Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities, net	(172.8)	(156.1)
Net change in short-term debt	4.2	88.9
(Payments on) proceeds from intercompany transactions	157.0	55.5
Proceeds from issuance of long-term debt	3.0
Payments on long-term debt	(0.7)	(2.9)
Net cash provided by (used in) financing activities	163.5	141.5
Additions to property, plant and equipment	(10.8)	(7.6)
Other	(2.0)	(1.0)
Net cash used in investing activities	(12.8)	(8.6)
Effect of exchange rate changes on cash	(22.3)	8.0
Net decrease in cash and cash equivalents	(44.4)	(15.2)
Cash and cash equivalents at beginning of period	468.9	444.2
Cash and cash equivalents at end of period	424.5	429.0
Eliminations
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities, net	(0.7)	(4.4)
(Payments on) proceeds from intercompany transactions	0.7	4.4
Net cash provided by (used in) financing activities	$ 0.7	$ 4.4