GOODWILL AND INTANGIBLE ASSETS (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended						3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended		3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2013 Enterix [Member]	Mar. 31, 2014 Intangible Assets Not Subject to Amortization - Tradenames [Member]	Dec. 31, 2013 Intangible Assets Not Subject to Amortization - Tradenames [Member]	Mar. 31, 2014 Intangible Assets Not Subject to Amortization - Other [Member]	Dec. 31, 2013 Intangible Assets Not Subject to Amortization - Other [Member]	Mar. 31, 2014 Customer-related intangibles [Member]	Dec. 31, 2013 Customer-related intangibles [Member]	Mar. 31, 2014 Non-compete agreements [Member]	Dec. 31, 2013 Non-compete agreements [Member]	Mar. 31, 2014 Technology [Member]	Dec. 31, 2013 Technology [Member]	Mar. 31, 2014 Other [Member]	Dec. 31, 2013 Other [Member]	Mar. 31, 2014 Total Amortizing Intangible Assets [Member]	Dec. 31, 2013 Total Amortizing Intangible Assets [Member]	Mar. 07, 2014 Solstas Lab Parnters Group [Member]	Dec. 31, 2013 UMass, ATN, Dignity and Con Verge Combined [Member]
Finite-Lived and Indefinite-lived Intangible Assets [Line Items]
Intangible assets																			$ 203
Goodwill, Balance at beginning of period	5,649	5,536	5,536																269
Goodwill acquired during the period	271		150
Goodwill impairment and write-off associated with sale of businesses during the period	0		(37)	(37)
Goodwill, Balance at end of period	5,920		5,649																269
Intangible assets																				108
Goodwill deductible for tax purposes																				135
Weighted Average Amortization Period									19 years		4 years		14 years		8 years		17 years
Amortizing intangible assets, Cost	1,422		1,218		244	244	1	1	873	670	43	43	119	119	142	141	1,177	973
Amortizing intangible assets, Accumulated Amortization	(344)		(322)						(220)	(210)	(30)	(27)	(31)	(28)	(63)	(57)	(344)	(322)
Amortizing intangible assets, Net	1,078		896		244	244	1	1	653	460	13	16	88	91	79	84	833	651
Amortization expense related to intangible assets	22	19
Remainder of 2014	67
Future Amortization Expense, 2015	79
Future Amortization Expense, 2016	71
Future Amortization Expense, 2017	67
Future Amortization Expense, 2018	59
Future Amortization Expense, 2019	58
Future Amortization Expense, Thereafter	432
Future Amortization Expense, Total	$ 833