Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities, net	$ (272.0)	$ (174.4)
Net change in short-term debt	(6.4)	34.0
Proceeds from issuance of long-term debt	4.0	691.6
Payments on long-term debt	(24.3)	(551.0)
Issuance (repurchase) of common stock, net	(33.5)	(269.8)
Excess tax benefits from stock-based compensation	21.5	34.9
Other	(0.4)	(24.8)
Net cash provided by (used in) financing activities	(39.1)	(85.1)
Additions to property, plant and equipment	(97.7)	(99.3)
Acquisition of businesses, net of cash acquired	(33.2)	(108.4)
Other	39.1	4.8
Net cash provided by (used in) investing activities	(91.8)	(202.9)
Effect of exchange rate changes on cash	(32.0)	(0.8)
Net decrease in cash and cash equivalents	(434.9)	(463.2)
Cash and cash equivalents at beginning of period	1,164.8	1,128.5
Cash and cash equivalents at end of period	729.9	665.3
Eliminations
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities, net		(5.1)
(Payments on) proceeds from intercompany transactions	(4.6)	5.1
Net cash provided by (used in) financing activities	(4.6)	5.1
Intercompany investing activities, net	4.6
Net cash provided by (used in) investing activities	4.6
Parent Company
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities, net	(110.6)	(196.0)
(Payments on) proceeds from intercompany transactions	(200.3)	(41.8)
Proceeds from issuance of long-term debt	2.0	690.0
Payments on long-term debt	(23.5)	(549.9)
Issuance (repurchase) of common stock, net	(33.5)	(269.8)
Excess tax benefits from stock-based compensation	21.5	34.9
Other	1.8	(16.6)
Net cash provided by (used in) financing activities	(232.0)	(153.2)
Additions to property, plant and equipment	(9.2)	(2.5)
Net cash provided by (used in) investing activities	(9.2)	(2.5)
Net decrease in cash and cash equivalents	(351.8)	(351.7)
Cash and cash equivalents at beginning of period	728.8	630.8
Cash and cash equivalents at end of period	377.0	279.1
Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities, net	(97.1)	71.8
Net change in short-term debt	(0.3)
(Payments on) proceeds from intercompany transactions	173.8	(13.4)
Proceeds from issuance of long-term debt		0.2
Payments on long-term debt	(0.5)	(0.7)
Other	(0.4)	(7.6)
Net cash provided by (used in) financing activities	172.6	(21.5)
Additions to property, plant and equipment	(66.3)	(54.5)
Acquisition of businesses, net of cash acquired	(7.1)
Intercompany investing activities, net	(4.6)
Other	(1.6)	(1.2)
Net cash provided by (used in) investing activities	(79.6)	(55.7)
Net decrease in cash and cash equivalents	(4.1)	(5.4)
Cash and cash equivalents at beginning of period	9.3	13.5
Cash and cash equivalents at end of period	5.2	8.1
Non-Guarantor Subsidiaries
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by (used in) operating activities, net	(64.3)	(45.1)
Net change in short-term debt	(6.1)	34.0
(Payments on) proceeds from intercompany transactions	31.1	50.1
Proceeds from issuance of long-term debt	2.0	1.4
Payments on long-term debt	(0.3)	(0.4)
Other	(1.8)	(0.6)
Net cash provided by (used in) financing activities	24.9	84.5
Additions to property, plant and equipment	(22.2)	(42.3)
Acquisition of businesses, net of cash acquired	(26.1)	(108.4)
Other	40.7	6.0
Net cash provided by (used in) investing activities	(7.6)	(144.7)
Effect of exchange rate changes on cash	(32.0)	(0.8)
Net decrease in cash and cash equivalents	(79.0)	(106.1)
Cash and cash equivalents at beginning of period	426.7	484.2
Cash and cash equivalents at end of period	$ 347.7	$ 378.1