Consolidated Statements Of Equity And Comprehensive Income (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Gain (Loss) [Member]	Treasury Shares [Member]	Non-Controlling Interests [Member]
Balance, beginning of year at Dec. 31, 2008		$ 561	$ 1,245	$ 7,237	$ (2,098)	$ (1,223)	$ 38
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the Company (a)	227			227
Net income attributable to non-controlling interests (e)	(14)						14
Purchase of subsidiary shares from non-controlling interests			(38)				(8)
Change in accrued stock compensation costs			54
Foreign currency translation adjustments (b)	346				346
Dividend equivalents paid				(14)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			2
Issuance of shares under stock compensation plans and employee stock purchase plans						136
Unrealized investment holding losses, net of reclassification adjustments (c)	(1)				(2)
Dividends declared – (per share amounts: $0.86 in 2011, $0.81 in 2010 and $0.80 in 2009)				(417)
Net changes under benefit plans, net of tax (d)	(417)				(417)
Other changes							(9)
Issuance of shares for acquisitions			(52)			281
TOTAL COMPREHENSIVE INCOME (LOSS) (a+b+c+d+e)	168
Balance, end of period at Dec. 31, 2009	5,863	561	1,211	7,033	(2,171)	(806)	35
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the Company (a)	855			855
Net income attributable to non-controlling interests (e)	(16)						16
Purchase of subsidiary shares from non-controlling interests
Change in accrued stock compensation costs			6
Foreign currency translation adjustments (b)	(27)				(27)
Dividend equivalents paid				(15)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(17)
Issuance of shares under stock compensation plans and employee stock purchase plans						180
Unrealized investment holding losses, net of reclassification adjustments (c)	(7)				(12)
Dividends declared – (per share amounts: $0.86 in 2011, $0.81 in 2010 and $0.80 in 2009)				(437)
Net changes under benefit plans, net of tax (d)	(90)				(90)
Other changes							(4)
Issuance of shares for acquisitions			(15)			198
Purchase of treasury shares						(86)
TOTAL COMPREHENSIVE INCOME (LOSS) (a+b+c+d+e)	742
Balance, end of period at Dec. 31, 2010	6,415	561	1,185	7,436	(2,300)	(514)	47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the Company (a)	993			993
Net income attributable to non-controlling interests (e)	(22)						22
Purchase of subsidiary shares from non-controlling interests			(2)				(5)
Change in accrued stock compensation costs			(13)
Foreign currency translation adjustments (b)	(104)				(104)
Dividend equivalents paid				(14)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(14)
Issuance of shares under stock compensation plans and employee stock purchase plans						280
Unrealized investment holding losses, net of reclassification adjustments (c)	(4)				(5)
Dividends declared – (per share amounts: $0.86 in 2011, $0.81 in 2010 and $0.80 in 2009)				(466)
Net changes under benefit plans, net of tax (d)	(779)				(779)
Other changes							(7)
Issuance of shares for acquisitions
Purchase of treasury shares						(361)
TOTAL COMPREHENSIVE INCOME (LOSS) (a+b+c+d+e)	127
Balance, end of period at Dec. 31, 2011	$ 5,940		$ 1,156	$ 7,949	$ (3,188)	$ (595)	$ 57