Consolidated Statements Of Shareholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Balance at Dec. 31, 2014	$ 24,251.3	$ 2.7	$ 10,062.3	$ 14,014.4	$ 171.9
Balance (in shares) at Dec. 31, 2014		268.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,379.1			2,379.1
Other comprehensive income (loss)	(388.1)				(388.1)
Premiums for and settlement of equity options	(14.0)		(14.0)
Repurchase and retirement of common stock, value	$ (1,515.8)	$ (0.1)	(382.2)	(1,133.5)
Repurchase and retirement of common stock, shares	(10.4)	(10.4)
Dividends and dividend equivalents	$ (498.2)			(498.2)
Issuance of common stock under employee stock plans, net of related tax benefits	247.8		247.8
Issuance of common stock under employee stock plans, net of related tax benefits, Shares		3.3
Convertible debenture repurchases and conversions	(1,095.1)		(1,095.1)
Equity Units contract payments and issuance costs	(130.9)		(130.9)
Balance at Sep. 30, 2015	23,236.1	$ 2.6	8,687.9	14,761.8	(216.2)
Balance (in shares) at Sep. 30, 2015		261.0
Balance at Dec. 31, 2015	23,044.1	$ 2.6	8,555.6	14,778.5	(292.6)
Balance (in shares) at Dec. 31, 2015		261.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,101.4			2,101.4
Other comprehensive income (loss)	(71.3)				(71.3)
Dividends and dividend equivalents	(515.8)			(515.8)
Issuance of common stock under employee stock plans, net of related tax benefits	185.5		185.5
Issuance of common stock under employee stock plans, net of related tax benefits, Shares		2.2
Equity units issuance costs adjustment	0.3		0.3
Balance at Sep. 30, 2016	$ 24,744.2	$ 2.6	$ 8,741.4	$ 16,364.1	$ (363.9)
Balance (in shares) at Sep. 30, 2016		263.4