Condensed Consolidating Statements of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	$ 81.4	$ 24.5
Net change in short-term debt	83.6	2.7
Proceeds from issuance of long-term debt	800.6	1,025.0
Payments on long-term debt	(153.2)	(1,102.8)
Issuance (repurchase) of common stock, net	(536.6)	(84.1)
Dividends paid	(7.5)	(22.6)
Excess tax benefits from stock-based compensation	42.7
Other	(17.4)	(5.2)
Net cash provided by (used in) financing activities	212.2	(187.0)
Additions to property, plant and equipment	(76.9)	(79.4)
Acquisition of businesses, net of cash acquired and earnout payments	(155.2)	(13.4)
Other	9.8	4.8
Net cash used in investing activities	(222.3)	(88.0)
Effect of exchange rate changes on cash	7.1	1.4
Net decrease in cash and cash equivalents	78.4	(249.1)
Cash and cash equivalents at beginning of period	808.3	695.4
Cash and cash equivalents at end of period	886.7	446.3
Parent Company
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	(225.8)	(335.9)
Proceeds (payments) from (to) intercompany transactions	245.8	338.4
Proceeds from issuance of long-term debt	800.0	1,025.0
Payments on long-term debt	(147.4)	(1,102.8)
Issuance (repurchase) of common stock, net	(536.6)	(84.1)
Dividends paid	(7.5)	(22.6)
Excess tax benefits from stock-based compensation	42.7
Other	(16.9)	(5.2)
Net cash provided by (used in) financing activities	380.1	148.7
Additions to property, plant and equipment	(4.2)	(1.5)
Acquisition of businesses, net of cash acquired and earnout payments	(0.9)	(0.9)
Other	2.3
Net cash used in investing activities	(2.8)	(2.4)
Net decrease in cash and cash equivalents	151.5	(189.6)
Cash and cash equivalents at beginning of period	335.4	287.1
Cash and cash equivalents at end of period	486.9	97.5
Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	272.6	363.4
Proceeds (payments) from (to) intercompany transactions	(252.6)	(286.5)
Proceeds from issuance of long-term debt	0.5
Payments on long-term debt	(0.3)
Net cash provided by (used in) financing activities	(252.4)	(286.5)
Additions to property, plant and equipment	(40.3)	(67.1)
Acquisition of businesses, net of cash acquired and earnout payments	(5.4)	(12.5)
Other	4.0
Net cash used in investing activities	(41.7)	(79.6)
Net decrease in cash and cash equivalents	(21.5)	(2.7)
Cash and cash equivalents at beginning of period	23.8	15.5
Cash and cash equivalents at end of period	2.3	12.8
Non-Guarantor Subsidiaries
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net cash provided by (used in) operating activities	34.6	(3.0)
Net change in short-term debt	83.6	2.7
Proceeds (payments) from (to) intercompany transactions	6.8	(51.9)
Proceeds from issuance of long-term debt	0.1
Payments on long-term debt	(5.5)
Other	(0.5)
Net cash provided by (used in) financing activities	84.5	(49.2)
Additions to property, plant and equipment	(32.4)	(10.8)
Acquisition of businesses, net of cash acquired and earnout payments	(148.9)
Other	3.5	4.8
Net cash used in investing activities	(177.8)	(6.0)
Effect of exchange rate changes on cash	7.1	1.4
Net decrease in cash and cash equivalents	(51.6)	(56.8)
Cash and cash equivalents at beginning of period	449.1	392.8
Cash and cash equivalents at end of period	$ 397.5	$ 336.0