Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value, Assets And Liabilities Measured On Recurring Basis

	Total				Level 1				Level 2				Level 3
	March		December 31		March		December 31		March		December 31		March		December 31
	2014		2013		2014		2013		2014		2013		2014		2013
Assets:
Cash and cash equivalents	$	1,381	$	1,339	$	1,381	$	1,339	$	—	$	—	$	—	$	—
Available-for-sale marketable securities
Corporate and asset-backed debt securities	1,172		1,177		—		—		1,172		1,177		—		—
Foreign government debt securities	828		845		—		—		828		845		—		—
United States agency debt securities	124		211		—		—		124		211		—		—
United States treasury debt securities	487		350		—		—		487		350		—		—
Certificates of deposit	51		53		—		—		51		53		—		—
Other	4		5		—		—		4		5		—		—
Total available-for-sale marketable securities	2,666		2,641		—		—		2,666		2,641		—		—
Trading marketable securities	74		72		74		72		—		—		—		—
Foreign currency exchange forward contracts	17		25		—		—		17		25		—		—
	$	4,138	$	4,077	$	1,455	$	1,411	$	2,683	$	2,666	$	—	$	—
Liabilities:
Deferred compensation arrangements	$	74	$	72	$	74	$	72	$	—	$	—	$	—	$	—
Contingent consideration	47		59		—		—		—		—		47		59
Foreign currency exchange forward contracts	6		2		—		—		6		2		—		—
	$	127	$	133	$	74	$	72	$	6	$	2	$	47	$	59

Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

	March			December
	2014			2013
Balance at the beginning of the period	$	59		$	103
Losses included in earnings	—			(5		)
Settlements	(12		)	(39		)
Balance at the end of the period	$	47		$	59

Summary Of Marketable Securities

Summary of marketable securities:
	Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses						Estimated Fair Value
	March		December		March		December		March			December			March		December
	2014		2013		2014		2013		2014			2013			2014		2013
Available-for-sale marketable securities:
Corporate and asset-backed debt securities	$	1,171	$	1,177	$	2	$	1	$	(1	)	$	(1	)	$	1,172	$	1,177
Foreign government debt securities	826		846		2		—		—			(1		)	828		845
United States agency debt securities	124		211		—		—		—			—			124		211
United States treasury debt securities	487		350		—		—		—			—			487		350
Certificates of deposit	51		53		—		—		—			—			51		53
Other	4		5		—		—		—			—			4		5
Total available-for-sale marketable securities	$	2,663	$	2,642	$	4	$	1	$	(1	)	$	(2	)	2,666		2,641
Trading marketable securities															74		72
Total marketable securities															$	2,740	$	2,713
Reported as:
Current assets-marketable securities															$	2,666	$	2,641
Noncurrent assets-other															74		72
															$	2,740	$	2,713

Investments Classified By Contractual Maturity Date

	Cost		Estimated Fair Value
Due in one year or less	$	522	$	521
Due after one year through three years	1,905		1,908
Due after three years	236		237
	$	2,663	$	2,666

Investments In A Continuous Unrealized Loss Position

	Corporate and Asset-Backed Debt Securities						Foreign Government Debt Securities				United States Agency Debt Securities				Other				Total
	Less Than 12 Months			Total			Less Than 12 Months		Total		Less Than 12 Months		Total		Less Than 12 Months		Total		Less Than 12 Months			Total
Number of investments	170			173			86		93		46		46		114		115		416			427
Fair value	$	389		$	396		$	490	$	576	$	228	$	228	$	15	$	15	$	1,122		$	1,215
Unrealized losses	$	(1	)	$	(1	)	$	—	$	—	$	—	$	—	$	—	$	—	$	(1	)	$	(1	)