SUPPLEMENTAL CASH FLOW & OTHER DATA (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Depreciation expense	$ 53	$ 51
Amortization expense	22	19
Interest paid	52	52
Income taxes paid	9	84
Assets acquired under capital leases	2	0
Decrease in accounts payable associated with capital expenditures	21	0
Fair value of assets acquired	646	151
Fair value of liabilities assumed	70	11
Fair value of net assets acquired	576	140
Merger consideration paid (payable), net	0	(50)
Cash paid for business acquisitions	576	90
Less: Cash acquired	9	0
Business acquisitions, net of cash acquired	$ 567	$ 90