Financial Instruments (Details)	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2011 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2012 Hedged Fixed-Rate Debt [Member] USD ($)	Sep. 30, 2011 Hedged Fixed-Rate Debt [Member] USD ($)	Sep. 30, 2012 Hedged Fixed-Rate Debt [Member] USD ($)	Sep. 30, 2011 Hedged Fixed-Rate Debt [Member] USD ($)	Sep. 30, 2012 Interest Rate Contract [Member] USD ($)	Sep. 30, 2011 Interest Rate Contract [Member] USD ($)	Sep. 30, 2012 Interest Rate Contract [Member] USD ($)	Sep. 30, 2011 Interest Rate Contract [Member] USD ($)	Sep. 30, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] Interest Rate Contract [Member] USD ($)	Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] Interest Rate Contract [Member] USD ($)	Sep. 30, 2012 Carrying (Reported) Amount, Fair Value Disclosure [Member] Foreign Exchange Contract [Member] USD ($)	Dec. 31, 2011 Carrying (Reported) Amount, Fair Value Disclosure [Member] Foreign Exchange Contract [Member] USD ($)	Sep. 30, 2012 Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2011 Fair Value, Inputs, Level 1 [Member] USD ($)	Sep. 30, 2012 Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 30, 2012 Fair Value, Inputs, Level 2 [Member] Interest Rate Contract [Member] USD ($)	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member] Interest Rate Contract [Member] USD ($)	Sep. 30, 2012 Fair Value, Inputs, Level 2 [Member] Foreign Exchange Contract [Member] USD ($)	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member] Foreign Exchange Contract [Member] USD ($)	Sep. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Interest Rate Contract [Member] USD ($)	Dec. 31, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] Interest Rate Contract [Member] USD ($)	Sep. 30, 2012 Estimate of Fair Value, Fair Value Disclosure [Member] Foreign Exchange Contract [Member] USD ($)	Dec. 31, 2011 Estimate of Fair Value, Fair Value Disclosure [Member] Foreign Exchange Contract [Member] USD ($)	Sep. 30, 2012 Corporate Debt Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Corporate Debt Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Corporate Debt Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Corporate Debt Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Corporate Debt Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Corporate Debt Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 30, 2012 Corporate Debt Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Corporate Debt Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 US Government Agencies Debt Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 US Government Agencies Debt Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 US Government Agencies Debt Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 US Government Agencies Debt Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 US Government Agencies Debt Securities [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2011 US Government Agencies Debt Securities [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Sep. 30, 2012 US Government Agencies Debt Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 US Government Agencies Debt Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 30, 2012 US Government Agencies Debt Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 US Government Agencies Debt Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Other Debt Obligations [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Other Debt Obligations [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Other Debt Obligations [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Other Debt Obligations [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Other Debt Obligations [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Other Debt Obligations [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Other Debt Obligations [Member] Fair Value, Inputs, Level 3 [Member] USD ($)	Sep. 30, 2012 Other Debt Obligations [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Other Debt Obligations [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Collateralized Mortgage Backed Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Collateralized Mortgage Backed Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Collateralized Mortgage Backed Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Collateralized Mortgage Backed Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Collateralized Mortgage Backed Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Collateralized Mortgage Backed Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 30, 2012 Collateralized Mortgage Backed Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Collateralized Mortgage Backed Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Asset-backed Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Asset-backed Securities [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Asset-backed Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Asset-backed Securities [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Asset-backed Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Dec. 31, 2011 Asset-backed Securities [Member] Fair Value, Inputs, Level 2 [Member] USD ($)	Sep. 30, 2012 Asset-backed Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Asset-backed Securities [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Equity Securities, US [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Equity Securities, US [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Equity Securities, US [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Equity Securities, US [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Equity Securities, US [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Dec. 31, 2011 Equity Securities, US [Member] Fair Value, Inputs, Level 1 [Member] USD ($)	Sep. 30, 2012 Equity Securities, US [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Equity Securities, US [Member] Estimate of Fair Value, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Equity Method and Other Investments [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Dec. 31, 2011 Equity Method and Other Investments [Member] Carrying (Reported) Amount, Fair Value Disclosure [Member] USD ($)	Sep. 30, 2012 Equity Method and Other Investments [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Dec. 31, 2011 Equity Method and Other Investments [Member] Available-for-Sale Securities, Amortized Cost [Member] USD ($)	Sep. 30, 2012 Buy British pound Sell euro [Member] EUR (€)	Sep. 30, 2012 Buy British pound Sell euro [Member] GBP (£)	Sep. 30, 2012 Buy US dollar Sell euro [Member] USD ($)	Sep. 30, 2012 Buy US dollar Sell euro [Member] EUR (€)	Sep. 30, 2012 Buy euro Sell US dollar [Member] USD ($)	Sep. 30, 2012 Buy euro Sell US dollar [Member] EUR (€)
Liabilities, Fair Value Disclosure, Nonrecurring	$ 66,900,000		$ 66,900,000		$ 121,600,000
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge						12,100,000	245,400,000	43,800,000	255,700,000
Cash and Cash Equivalents, Fair Value Disclosure														5,319,200,000	5,922,500,000					5,319,200,000	5,922,500,000	5,235,300,000	5,264,600,000	83,900,000	657,900,000					5,319,200,000	5,922,500,000
Long-term Debt														(5,520,000,000)	(6,981,500,000)									(6,072,200,000)	(7,451,500,000)					(6,072,200,000)	(7,451,500,000)
Derivative Assets, Current																	6,100,000		16,200,000								6,100,000		16,200,000				6,100,000		16,200,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Other, Percentage of Nonperforming Assets	85.00%
Notional Amount of Foreign Currency Derivative Purchase Contracts																																																																																												202,000,000	863,900,000			892,200,000
Notional Amount of Foreign Currency Derivative Sale Contracts																																																																																											252,400,000			669,900,000	1,160,000,000
Maximum Remaining Maturity of Foreign Currency Derivatives			30 days
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate	100.00%		100.00%
Description of Derivative Activity Volume Percent	60.00%		60.00%
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments										(12,100,000)	(245,400,000)	(43,800,000)	(255,700,000)
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	9,000,000		9,000,000
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion	2,300,000	2,300,000	6,700,000	6,700,000
Derivative Instruments, Gain (Loss) Recognized in Income, Net	(23,700,000)	(51,700,000)	(38,500,000)	(1,000,000)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net		15,500,000	0	41,200,000
Derivative Assets, Noncurrent																581,700,000	531,700,000	7,000,000								581,700,000	531,700,000	7,000,000				581,700,000	531,700,000	7,000,000
Derivative Liabilities, Current																		(18,400,000)	(25,900,000)									(18,400,000)	(25,900,000)					(18,400,000)	(25,900,000)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	50,000,000
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	5,440,000,000		5,440,000,000
Available-for-sale Securities, Gross Unrealized Gains	150,600,000		150,600,000		103,000,000
Available-for-sale Securities, Gross Unrealized Losses	34,700,000		34,700,000		80,000,000
Available-for-sale Securities, Continuous Unrealized Gain Position, Fair Value	5,050,600,000		5,050,600,000		2,498,900,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	942,300,000		942,300,000		2,164,400,000
Other than Temporary Impairment Losses, Investments	800,000	10,900,000	8,200,000	17,900,000
Proceeds from Sale and Maturity of Available-for-sale Securities	1,698,800,000	775,700,000	5,334,100,000	1,274,200,000
Available-for-sale Securities, Gross Realized Gains	43,100,000	25,600,000	70,000,000	113,600,000
Available-for-sale Securities, Gross Realized Losses	2,200,000	2,500,000	7,400,000	7,600,000
Available-for-sale Securities, Current [Abstract]
Available-for-sale Securities, Debt Securities, Current																																				1,509,100,000	600,700,000	1,507,100,000	601,100,000	1,509,100,000	600,700,000	1,509,100,000	600,700,000	61,000,000	362,300,000	61,000,000	362,300,000	61,000,000	351,300,000		11,000,000	61,000,000	362,300,000	10,600,000	11,600,000	10,600,000	11,600,000	10,600,000	11,600,000		10,600,000	11,600,000
Available-for-sale Securities, Current, Total														1,580,700,000	974,600,000					1,578,700,000	975,000,000
Available-for-sale Securities, Noncurrent [Abstract]
Available-for-sale Securities, Debt Securities, Noncurrent																																				2,623,800,000	2,081,300,000	2,593,200,000	2,093,300,000	2,623,800,000	2,081,300,000	2,623,800,000	2,081,300,000	1,124,100,000	908,800,000	1,121,100,000	901,300,000	885,700,000	673,500,000	238,400,000	235,300,000	1,124,100,000	908,800,000	3,300,000	10,000,000	3,300,000	11,900,000	3,300,000	8,700,000	1,300,000	3,300,000	10,000,000	401,600,000	443,800,000	405,300,000	479,100,000	401,600,000	443,800,000	401,600,000	443,800,000	676,100,000	245,000,000	692,500,000	253,200,000	676,100,000	245,000,000	676,100,000	245,000,000
Available-for-sale Securities, Equity Securities, Noncurrent																																																																															183,400,000	180,800,000	83,000,000	107,500,000	183,400,000	180,800,000	183,400,000	180,800,000
Other Long-term Investments																																																																																							212,000,000	160,100,000	212,000,000	160,100,000
Available-for-sale Securities, Noncurrent, Total														$ 5,224,300,000	$ 4,029,800,000					$ 5,110,400,000	$ 4,006,400,000