Acquisitions (Narrative) (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	0 Months Ended	2 Months Ended	9 Months Ended	12 Months Ended	15 Months Ended
	Feb. 07, 2012	Feb. 29, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2012
Business Acquisition [Line Items]
Business combination, total contingent consideration paid				$ 6,000,000
Business acquisition, contingent consideration paid, post 141R acquisition				3,000,000
Business acquisition, pre-414R contingent consideration paid				3,000,000
Stated interest rate on senior notes	8.00%
Business Acquisition, Purchase Price Allocation, Goodwill Amount				1,922,689,000	1,922,689,000
Goodwill acquired				1,922,689,000	1,922,689,000
Maximum additional consideration for acquisitions payable through 2012				10,000,000	10,000,000
Other Acquisitions [Member]
Business Acquisition [Line Items]
Approximately cash paid				25,500,000	25,500,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount				22,600,000	22,600,000
Goodwill acquired				22,600,000	22,600,000
Additional consideration payment after the settlement of certain liabilities and administrative formalities				5,600,000	5,600,000
Maximum additional consideration for acquisitions payable through 2012				6,500,000	6,500,000
Additional consideration attributable to acquisition				8,000,000	8,000,000
Business Acquisition, Percentage of Voting Interests Acquired				100.00%	100.00%
Complete Production Services, Inc. [Member]
Business Acquisition [Line Items]
Cash paid to acquire equity interest	2,914,800,000
Complete stockholders received of a share of the company's common stock	0.945
Business acquisition cost of acquired entity cash paid per share	$ 7.00
Approximately cash paid	553,300,000
Business acquisition Equity consideration paid number of shares	74.7
Approximately cash acquisition	2,308,200,000
Closing price of our common stock on the merger date	$ 30.90
Company will repay of complete debt	676,000,000
Prepayment premium of senior notes	26,000,000
Senior notes	650,000,000
Estimated Fair Value of Option Issued for Due to Conversion	1.1999
Estimated Fair Value of Option and Restricted Stock Issued as Consideration	58,100,000
Fair value of options and restricted stock capitalized as part of total consideration	56,600,000
Estimated Fair Value of Option Recorded as Part of Consideration Transferred	52,700,000
Estimated Fair Value Of Option Recorded As Part Of Consideration Transferred Recorded As Expense	3,900,000
Amount expensed over remaining service term of replacement stock option awards	1,500,000
Estimated fair value of options and restricted stock related to pre-combination service recorded as expense	600,000
Additional amount of expensed over remaining service term of replacement restricted stock awards	18,200,000
Cash and accounts receivable, including unbilled receivables	214,600,000
Cash and accounts receivable, including unbilled receivables, at fair value	443,700,000
Gross amount due from customers	449,000,000
Customers deemed to be doubtful	5,300,000
Adjustment to present property, plant and equipment acquired at its estimated fair value			44,200,000
Property, Plant and Equipment, useful life			6 years
Goodwill recognized from this acquisition			19,000,000
Overall adjustment to deferred tax				125,500,000
Total acquisition cost, expense recorded				28,800,000	33,300,000
Non-recurring Expenses		$ 48,400,000	$ 81,600,000