Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	$ 19.8	$ (24.7)
Net change in short-term debt	78.9	2.7
Proceeds from issuance of long-term debt	300.5	1,025.0
Payments on long-term debt	(132.6)	(1,095.0)
Issuance (repurchase) of common stock, net	(433.0)	(40.0)
Dividends paid	(7.5)	(15.0)
Other	2.4	(9.9)
Net cash provided by (used in) financing activities	(191.3)	(132.2)
Additions to property, plant and equipment	(50.1)	(51.1)
Other	6.3	(9.6)
Net cash used in investing activities	(43.8)	(60.7)
Effect of exchange rate changes on cash	(2.8)	16.8
Net increase (decrease) in cash and cash equivalents	(218.1)	(200.8)
Cash and cash equivalents at beginning of period	808.3	695.4
Cash and cash equivalents at end of period	590.2	494.6
Parent Company
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	(145.4)	(111.3)
Proceeds (payments) from (to) intercompany transactions	226.4	100.7
Proceeds from issuance of long-term debt	300.0	1,025.0
Payments on long-term debt	(128.8)	(1,095.0)
Issuance (repurchase) of common stock, net	(433.0)	(40.0)
Dividends paid	(7.5)	(15.0)
Other	2.4	(9.9)
Net cash provided by (used in) financing activities	(40.5)	(34.2)
Additions to property, plant and equipment	(4.4)	(0.5)
Other	2.3
Net cash used in investing activities	(2.1)	(0.5)
Net increase (decrease) in cash and cash equivalents	(188.0)	(146.0)
Cash and cash equivalents at beginning of period	335.4	287.1
Cash and cash equivalents at end of period	147.4	141.1
Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	223.7	192.3
Proceeds (payments) from (to) intercompany transactions	(219.5)	(136.8)
Proceeds from issuance of long-term debt	0.5
Payments on long-term debt	(0.2)
Net cash provided by (used in) financing activities	(219.2)	(136.8)
Additions to property, plant and equipment	(26.8)	(43.6)
Other	1.3	(9.6)
Net cash used in investing activities	(25.5)	(53.2)
Net increase (decrease) in cash and cash equivalents	(21.0)	2.3
Cash and cash equivalents at beginning of period	23.8	15.5
Cash and cash equivalents at end of period	2.8	17.8
Non-Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	(58.5)	(105.7)
Net change in short-term debt	78.9	2.7
Proceeds (payments) from (to) intercompany transactions	(6.9)	36.1
Payments on long-term debt	(3.6)
Net cash provided by (used in) financing activities	68.4	38.8
Additions to property, plant and equipment	(18.9)	(7.0)
Other	2.7
Net cash used in investing activities	(16.2)	(7.0)
Effect of exchange rate changes on cash	(2.8)	16.8
Net increase (decrease) in cash and cash equivalents	(9.1)	(57.1)
Cash and cash equivalents at beginning of period	449.1	392.8
Cash and cash equivalents at end of period	$ 440.0	$ 335.7