Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income (loss)	$ 232	$ (27)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	588	617
Government settlement and related costs	1
Stock-based compensation expense	30	22
Loss on sale, net	1
Impairment of long-lived assets and hospitals sold or held for sale	8	46
Loss from early extinguishment of debt	16	73
Excess tax benefit relating to stock-based compensation		(3)
Other non-cash expenses, net	(1)	19
Changes in operating assets and liabilities, net of effects of acquisitions and divestitures:
Patient accounts receivable	(88)	(166)
Supplies, prepaid expenses and other current assets	(30)	38
Accounts payable, accrued liabilities and income taxes	(238)	(55)
Other	(15)	(50)
Net cash provided by operating activities	504	514
Cash flows from investing activities:
Acquisitions of facilities and other related equipment	(27)	(3,041)
Purchases of property and equipment	(474)	(361)
Proceeds from disposition of hospitals and other ancillary operations	62	12
Proceeds from sale of property and equipment	11	3
Purchases of available-for-sale securities	(90)	(137)
Proceeds from sales of available-for-sale securities	86	123
Increase in other investments	(80)	(251)
Net cash used in investing activities	(512)	(3,652)
Cash flows from financing activities:
Proceeds from exercise of stock options	22	14
Repurchase of restricted stock shares for payroll tax withholding requirements	(20)	(11)
Deferred financing costs and other debt-related costs	(30)	(269)
Excess tax benefit relating to stock-based compensation		3
Proceeds from noncontrolling investors in joint ventures		10
Redemption of noncontrolling investments in joint ventures	(14)	(6)
Distributions to noncontrolling investors in joint ventures	(48)	(44)
Borrowings under credit agreements	2,385	7,488
Issuance of long-term debt		4,000
Proceeds from receivables facility	91	133
Repayments of long-term indebtedness	(2,522)	(8,164)
Net cash (used in) provided by financing activities	(136)	3,154
Net change in cash and cash equivalents	(144)	16
Cash and cash equivalents at beginning of period	509	373
Cash and cash equivalents at end of period	365	389
Supplemental disclosure of cash flow information:
Interest payments	(459)	(352)
Income tax (payments) refunds, net	$ (9)	$ 73