Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Valuation Of Financial Instruments By Pricing Categories

	Total				(Level 1)				(Level 2)				(Level 3)
	2013		2012		2013		2012		2013		2012		2013		2012
Assets:
Cash and cash equivalents	$	1,339	$	1,395	$	1,339	$	1,395	$	—	$	—	$	—	$	—
Available-for-sale marketable securities
Corporate and asset-backed debt securities	1,177		1,280		—		—		1,177		1,280		—		—
Foreign government debt securities	845		848		—		—		845		848		—		—
United States agency debt securities	211		288		—		—		211		288		—		—
United States treasury debt securities	350		343		—		—		350		343		—		—
Certificates of deposit	53		114		—		—		53		114		—		—
Other	5		17		—		—		5		17		—		—
Total available-for-sale marketable securities	2,641		2,890		—		—		2,641		2,890		—		—
Trading marketable securities	72		57		72		57		—		—		—		—
Foreign currency exchange forward contracts	25		3		—		—		25		3		—		—
	$	4,077	$	4,345	$	1,411	$	1,452	$	2,666	$	2,893	$	—	$	—
Liabilities:
Deferred compensation arrangements	$	72	$	57	$	72	$	57	$	—	$	—	$	—	$	—
Contingent consideration	59		103		—		—		—		—		59		103
Foreign currency exchange forward contracts	2		1		—		—		2		1		—		—
	$	133	$	161	$	72	$	57	$	2	$	1	$	59	$	103

Assets and Liabilities Measured At Fair Value On A Recurring Basis Using Unobservable Inputs (Level 3)

	Total						Corporate and Asset-Backed Debt Securities					Contingent Consideration
	2013			2012			2013		2012			2013			2012
Balance at the beginning of the period	$	(103	)	$	(114	)	$	—	$	1		$	(103	)	$	(115	)
Transfers into Level 3	—			—			—		—			—			—
Transfers out of Level 3	—			—			—		—			—			—
Gains or (losses) included in earnings	5			6			—		—			5			6
Sales	—			(1		)	—		(1		)	—			—
Settlements	39			39			—		—			39			39
Other	—			(33		)	—		—			—			(33		)
Balance at the end of the period	$	(59	)	$	(103	)	$	—	$	—		$	(59	)	$	(103	)

Contingent Consideration

				Probability Range (Weighted Average)
	Fair Value	Valuation Technique	Unobservable Input	Minimum	Maximum	Weighted Average
Contingent consideration	$59	Discounted cash flow	Probability of occurrence	85	100	95

Marketable Securities

	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses						Estimated Fair Value
	2013		2012		2013		2012		2013			2012			2013		2012
Available-for-sale marketable securities:
Corporate and asset-backed debt securities	$	1,177	$	1,277	$	1	$	4	$	(1	)	$	(1	)	$	1,177	$	1,280
Foreign government debt securities	846		846		—		2		(1		)	—			845		848
United States agency debt securities	211		288		—		—		—			—			211		288
United States treasury debt securities	350		343		—		—		—			—			350		343
Certificates of deposit	53		114		—		—		—			—			53		114
Other	5		17		—		—		—			—			5		17
Total available-for-sale marketable securities	$	2,642	$	2,885	$	1	$	6	$	(2	)	$	(1	)	2,641		2,890
Trading marketable securities															72		57
Total marketable securities															$	2,713	$	2,947
Reported as:
Current assets-marketable securities															$	2,641	$	2,890
Noncurrent assets-other															72		57
															$	2,713	$	2,947

Net Carrying Value And Estimated Fair Value Of Available-For-Sale Marketable Securities

	Cost		Estimated Fair Value
Due in one year or less	$	425	$	424
Due after one year through three years	1,989		1,989
Due after three years	228		228
	$	2,642	$	2,641

Unrealized Losses And Fair Value Of Investments With Unrealized Losses

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