Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block]

The effective portion of risk-management instruments that was recognized in other comprehensive income (loss) is as follows:



	2016			2015			2014
Cash flow hedges:
Equity contracts	$	—		$	—		$	149.6
Forward-starting interest rate swaps	(3.4		)	(56.7		)	(164.7		)
Net investment hedges:
Foreign currency-denominated notes	137.5			—			—
Cross-currency interest rate swaps	32.5			—			—
Foreign currency exchange contracts	31.9			—			—

Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block]

The table below summarizes the contractual maturities of our investments in debt securities measured at fair value as of December 31, 2016:



	Maturities by Period
	Total		Within 1 Year		After 1 Year Through 5 Years		After 5 Years Through 10 Years		After 10 Years
Fair value of debt securities	$	5,522.9	$	1,456.0	$	3,762.2	$	89.0	$	215.7

Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]

The following effects of risk-management instruments were recognized in other–net, (income) expense:



	2016			2015			2014
Fair value hedges:
Effect from hedged fixed-rate debt	$	(30.8	)	$	(11.9	)	$	156.9
Effect from interest rate contracts	30.8			11.9			(156.9		)
Cash flow hedges:
Effective portion of losses on equity contracts reclassified from accumulated other comprehensive loss	—			—			129.0
Effective portion of losses on interest rate contracts reclassified from accumulated other comprehensive loss	15.0			13.7			9.0
Net (gains) losses on foreign currency exchange contracts not designated as hedging instruments	78.8			(28.2		)	(20.4		)

Fair Value, Assets Measured on Recurring Basis [Table Text Block]

The following tables summarize certain fair value information at December 31 for assets and liabilities measured at fair value on a recurring basis, as well as the carrying amount and amortized cost of certain other investments:



					Fair Value Measurements Using
Description	Carrying Amount		Cost⁽¹⁾		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Fair Value
December 31, 2016
Cash equivalents	$	2,986.8	$	2,986.8	$	2,699.4	$	287.4	$	—	$	2,986.8
Short-term investments:
U.S. government and agency securities	$	232.5	$	232.6	$	232.5	$	—	$	—	$	232.5
Corporate debt securities	1,219.2		1,219.1		—		1,219.2		—		1,219.2
Asset-backed securities	4.3		4.3		—		4.3		—		4.3
Other securities	0.5		0.5		—		0.5		—		0.5
Short-term investments	$	1,456.5
Noncurrent investments:
U.S. government and agency securities	$	318.9	$	323.8	$	318.9	$	—	$	—	$	318.9
Corporate debt securities	3,062.2		3,074.3		—		3,062.2		—		3,062.2
Mortgage-backed securities	183.1		185.4		—		183.1		—		183.1
Asset-backed securities	502.7		503.5		—		502.7		—		502.7
Other securities	153.7		77.6		—		—		153.7		153.7
Marketable equity securities	418.2		91.9		418.2		—		—		418.2
Cost and equity method investments⁽²⁾	568.7
Noncurrent investments	$	5,207.5

December 31, 2015
Cash equivalents	$	1,644.4	$	1,644.4	$	1,637.0	$	7.4	$	—	$	1,644.4
Short-term investments:
U.S. government and agency securities	$	153.2	$	153.4	$	153.2	$	—	$	—	$	153.2
Corporate debt securities	625.8		626.9		—		625.8		—		625.8
Asset-backed securities	3.3		3.3		—		3.3		—		3.3
Other securities	3.1		3.1		—		3.1		—		3.1
Short-term investments	$	785.4
Noncurrent investments:
U.S. government and agency securities	$	284.5	$	286.0	$	283.5	$	1.0	$	—	$	284.5
Corporate debt securities	1,962.6		1,995.8		—		1,962.6		—		1,962.6
Mortgage-backed securities	153.3		154.7		—		153.3		—		153.3
Asset-backed securities	441.9		443.1		—		441.9		—		441.9
Other securities	137.1		97.3		—		4.1		133.0		137.1
Marketable equity securities	128.9		74.8		128.9		—		—		128.9
Cost and equity method investments⁽²⁾	538.3
Noncurrent investments	$	3,646.6

⁽¹⁾ For available-for-sale debt securities, amounts disclosed represent the securities' amortized cost.

⁽²⁾ Fair value disclosures are not applicable for cost method and equity method investments.

Fair Value, Liabilities Measured on Recurring Basis [Table Text Block]



				Fair Value Measurements Using
Description	Carrying Amount			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)		Fair Value
Short-term commercial paper borrowings
December 31, 2016	$	(1,299.3	)	$	—	$	(1,299.3	)	$	—	$	(1,299.3	)
December 31, 2015	—			—		—			—		—

Long-term debt, including current portion
December 31, 2016	$	(9,005.9	)	$	—	$	(9,419.1	)	$	—	$	(9,419.1	)
December 31, 2015	(7,978.5		)	—		(8,172.0		)	—		(8,172.0		)

Fair Value, by Balance Sheet Grouping [Table Text Block]



				Fair Value Measurements Using
Description	Carrying Amount			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Fair Value
December 31, 2016
Risk-management instruments
Interest rate contracts designated as fair value hedges:
Other receivables	$	2.4		$	—	$	2.4		$	—		$	2.4
Sundry	37.0			—		37.0			—			37.0
Other noncurrent liabilities	(0.5		)	—		(0.5		)	—			(0.5		)
Cross-currency interest rate contracts designated as net investment hedges:
Sundry	31.4			—		31.4			—			31.4
Foreign exchange contracts not designated as hedging instruments:
Other receivables	31.8			—		31.8			—			31.8
Other current liabilities	(21.7		)	—		(21.7		)	—			(21.7		)
Contingent consideration liabilities⁽¹⁾:
Other current liabilities	(215.9		)	—		—			(215.9		)	(215.9		)
Other noncurrent liabilities	(242.6		)	—		—			(242.6		)	(242.6		)

December 31, 2015
Risk-management instruments
Interest rate contracts designated as fair value hedges:
Sundry	$	70.1		$	—	$	70.1		$	—		$	70.1
Other noncurrent liabilities	(0.4		)	—		(0.4		)	—			(0.4		)
Foreign exchange contracts not designated as hedging instruments:
Other receivables	13.1			—		13.1			—			13.1
Other current liabilities	(17.3		)	—		(17.3		)	—			(17.3		)
Contingent consideration liabilities⁽¹⁾:
Other current liabilities	(243.7		)	—		—			(243.7		)	(243.7		)
Other noncurrent liabilities	(427.2		)	—		—			(427.2		)	(427.2		)

⁽¹⁾ Contingent consideration liabilities primarily relate to the Erbitux arrangement with BMS discussed in Note 4.

Available-for-sale Securities [Table Text Block]

A summary of the fair value of available-for-sale securities in an unrealized gain or loss position and the amount of unrealized gains and losses (pretax) in accumulated other comprehensive loss follows:



	2016		2015
Unrealized gross gains	$	352.6	$	68.0
Unrealized gross losses	34.1		52.5
Fair value of securities in an unrealized gain position	1,869.7		764.5
Fair value of securities in an unrealized loss position	3,262.3		2,933.4

Gain (Loss) on Investments [Table Text Block]

Activity related to our investment portfolio, substantially all of which related to available-for-sale securities, was as follows:



	2016		2015		2014
Proceeds from sales	$	3,240.5	$	4,733.3	$	14,609.5
Realized gross gains on sales	30.7		255.1		353.5
Realized gross losses on sales	14.6		10.3		29.4

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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- Definition

Tabular disclosure of the realized and unrealized gains and losses reported in the statement of income which have resulted from the sale and holding of marketable securities, respectively, as well as the sale or disposal of cost method investments. Such amounts would include realized gains and losses on the sale or disposal of trading, available-for-sale, and held-to-maturity securities, unrealized gains and losses on trading securities, unrealized gains and losses on available-for-sale and held-to-maturity securities transferred to the trading securities category, realized gains and losses on the sale or disposal of cost method investments, and losses recognized for other than temporary impairments (OTTI) of such investments.

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