BUSINESS ACQUISITIONS Business Acquisitions in the Aggregate (Details) - USD ($) $ / shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Feb. 19, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Cash consideration					$ 780.8
Other Long-term Debt	$ 715.0		$ 715.0			$ 0.0
Revenues	2,317.3	$ 1,551.8	6,379.6	$ 4,498.9
Revenues		2,222.8
Net Income (Loss) Attributable to Parent		172.7
Payments to Acquire Businesses, Net of Cash Acquired			3,692.7	65.3
Goodwill, Acquired During Period			2,980.0	$ 81.8
Accounts receivable					334.8
Unbilled Receivables, Current	90.9		90.9
Inventories					51.9
Deferred income taxes					34.4
Goodwill	6,068.6		6,068.6			$ 3,099.4	$ 3,022.8
Operating income		$ 298.7
Basic		$ 1,720
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 1,690
Covance [Member]
Business Acquisition [Line Items]
Business Acquisition, Transaction Costs			207.6
Post combination acceleration of stock compensation expense			43.2
Employer taxes on accelerated equity			9.4
Make-whole payment			37.4
Cash paid for acquisition					4,388.2
Other Significant Noncash Transaction, Value of Consideration Given					1,762.5
Total acquisition consideration (cash and non-cash)					6,150.7
Cash consideration					780.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent					771.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt					250.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable					190.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities					280.8
Deferred Revenue					168.0
Other Long-term Debt					1,000,000.0
Revenues	647.0		1,535.0
Revenues		$ 6,523.3	6,732.8
Net Income (Loss) Attributable to Parent		274.8	432.5
Cash on Hand Used for Acquisition					488.2
Acquisition Financing					3,900,000.0
Other long term debt acquistion financing					400.0
Accounts receivable					334.8
Unbilled Receivables, Current					138.7
Inventories					51.9
Deferred income taxes					34.4
Goodwill					2,907.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets					15.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets					7,905.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other					93.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					1,754.3
Operating income		$ 622.2	$ 878.8
Basic		$ 2,730	$ 4,270
Business Acquisition, Pro Forma Earnings Per Share, Diluted		$ 2,690	$ 4,210
Covance, Inc. [Member]
Business Acquisition [Line Items]
Change in control and severance payments			$ 26.8
Legal Fees			75.6
Write off of bridge and other deferred financing costs			15.2
Excluding Covance [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired			85.3
Finite-lived Intangible Assets Acquired			19.6
Goodwill, Acquired During Period			$ 63.3
Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			28 years
Customer Relationships [Member] | Covance [Member]
Business Acquisition [Line Items]
Prepaid expenses and other					306.9
Property, plant and equipment					1,060.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					1,912.2
Customer Relationships [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	(5.0)
Trademarks and Trade Names [Member] | Covance [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			15 years
Trademarks and Trade Names [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	4.3
Trade Names [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					293.7
Use Rights [Member] | Covance [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			8 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					0.0
Use Rights [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	(4.9)
Software and Software Development Costs [Member] | Covance [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					62.2
Software and Software Development Costs [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	62.2
Off-Market Favorable Lease [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					5.5
Off-Market Favorable Lease [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles	$ 5.5
Prepaid Expenses and Other Current Assets [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	45.5
Property, Plant and Equipment [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	216.7
Goodwill [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					2,907.8
Goodwill [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	-268.3
Other Assets [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	0
Assets, Total [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	56
Accounts Payable [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	0
Accrued Liabilities [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	0
Deferred tax liability [Domain] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	41
Other Liabilities [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	15
Liabilities, Total [Member] | Covance, Inc. [Member]
Business Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Items	56
Scenario, Previously Reported [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent					730.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets					7,849.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other					78.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities					1,698.3
Scenario, Previously Reported [Member] | Customer Relationships [Member] | Covance [Member]
Business Acquisition [Line Items]
Property, plant and equipment					844.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					1,917.2
Scenario, Previously Reported [Member] | Trade Names [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					289.4
Scenario, Previously Reported [Member] | Use Rights [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					4.9
Scenario, Previously Reported [Member] | Software and Software Development Costs [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					0.0
Scenario, Previously Reported [Member] | Off-Market Favorable Lease [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					0.0
Scenario, Previously Reported [Member] | Prepaid Expenses and Other Current Assets [Member] | Covance [Member]
Business Acquisition [Line Items]
Prepaid expenses and other					261.4
Scenario, Previously Reported [Member] | Goodwill [Member] | Covance [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill					3,176.1
Scenario, Previously Reported [Member] | Other Assets [Member] | Covance [Member]
Business Acquisition [Line Items]
Prepaid expenses and other					15.2
Scenario, Previously Reported [Member] | Accounts Payable [Member] | Covance [Member]
Business Acquisition [Line Items]
Prepaid expenses and other					190.8
Scenario, Previously Reported [Member] | Accrued Liabilities [Member] | Covance [Member]
Business Acquisition [Line Items]
Prepaid expenses and other					$ 280.8