Preliminary Estimates of Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $) In Millions, unless otherwise specified												3 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Wildcat Wireline LLC	Sep. 30, 2014 Vision Oil Tools, LLC	Sep. 30, 2014 Cornell [Member]	Sep. 30, 2014 Other 2014 Acquisitions [Member]	Sep. 30, 2014 Energy Services	Dec. 31, 2013 Energy Services	Sep. 30, 2014 Manufacturing	Sep. 30, 2014 Manufacturing Domestic	Sep. 30, 2014 Manufacturing Foreign	Sep. 30, 2014 Blue Dot Member
Business Combination, Separately Recognized Transactions [Line Items]
Increase in identified intangibles												$ 8.0
Increase in Accounts Receivable												3.9
Decrease in goodwill												11.9
Accounts receivable-trade			0.4	10.8	10.5	15.1	36.8	14.8		12.2	12.8
Inventories			1.3			0.4	1.7	3.9		16.1	8.0
Other current and non-current assets				2.4		0.1	2.5	0.2		1.3	0.5
Property and equipment			26.9	44.7	28.7	41.2	141.5	35.5		6.6	5.6
Goodwill	2,253.6	1,571.0	97.3	89.3	74.7	71.9	333.2	42.1	400.5	189.1	211.4
Identified intangibles			27.5	30.0	24.5	27.0	109.0	28.5	98.5	46.1	52.4
Accounts payable				(1.5)	(0.7)	(4.0)	(6.2)	(10.0)		(4.3)	(3.7)
Other current and non-current liabilities				(35.0)	(67.0)	(4.2)	(106.2)	(1.0)		(10.8)	(11.7)
Total purchase price			$ 153.4	$ 140.7	$ 70.7	$ 147.5	$ 512.3	$ 114.0		$ 256.3	$ 275.3