Business Combinations (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jan. 31, 2016	Jan. 31, 2015
Business Combination, Separately Recognized Transactions [Line Items]
Goodwill	$ 1,328.7	$ 1,069.8	$ 954.9	$ 1,286.5
Unaudited pro forma revenues had business acquisitions occurred at the beginning of the period	1,763.2	1,587.3
Unaudited pro forma net earnings had business acquisitions occurred at the beginning of the period	$ 100.5	$ 178.8
Unaudited pro forma diluted net earnings per share had business acquisitions occurred at the beginning of the period	$ 1.92	$ 3.42
Non-recurring costs	$ 56.9	$ 24.2
Other non-recurring costs	67.3
Wildcat Wireline LLC
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			0.4
Inventories			1.3
Property and equipment			30.3
Goodwill			83.7
Identified intangibles			37.7
Total consideration paid			153.4
Vision Oil Tools, LLC
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			10.8
Other current and non-current assets			2.4
Property and equipment			44.1
Goodwill			69.8
Identified intangibles			50.1
Accounts payable			(1.5)
Other current and non-current liabilities			(35.0)
Total consideration paid			140.7
Cornell
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			10.5
Property and equipment			28.5
Goodwill			57.5
Identified intangibles			33.6
Accounts payable			(0.7)
Other current and non-current liabilities			(57.2)
Total consideration paid			72.2
Other 2014 Acquisitions
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			15.1
Inventories			0.4
Other current and non-current assets			0.1
Property and equipment			40.5
Goodwill			58.3
Identified intangibles			40.6
Accounts payable			(4.3)
Other current and non-current liabilities			(4.2)
Total consideration paid			146.5
2014 Acquisitions
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			36.8
Inventories			1.7
Other current and non-current assets			2.5
Property and equipment			143.4
Goodwill	269.3		269.3
Identified intangibles	$ 162.0		162.0
Accounts payable			(6.5)
Other current and non-current liabilities			(96.4)
Total consideration paid			512.8
2013 Acquisitions
Business Combination, Separately Recognized Transactions [Line Items]
Accounts receivable-trade			14.8
Inventories			3.9
Other current and non-current assets			0.2
Property and equipment			35.5
Goodwill			37.4
Identified intangibles			33.2
Accounts payable			(10.0)
Other current and non-current liabilities			(1.0)
Total consideration paid			$ 114.0