Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income	$ 654	$ 854
Adjustments to reconcile net income to net cash provided by operating activities:
Changes in operating assets and liabilities	(1,576)	(1,698)
Provision for doubtful accounts	1,424	1,352
Depreciation and amortization	716	710
Income taxes	317	(111)
Losses on sales of facilities	1
Impairments of long-lived assets		109
Loss on retirement of debt	75
Amortization of deferred loan costs	39	40
Share-based compensation	16	16
Other		23
Net cash provided by operating activities	1,666	1,295
Cash flows from investing activities:
Purchase of property and equipment	(776)	(536)
Acquisition of hospitals and health care entities	(168)	(31)
Disposition of hospitals and health care entities	54	25
Change in investments	76	502
Other	2	(11)
Net cash used in investing activities	(812)	(51)
Cash flows from financing activities:
Issuance of long-term debt		1,387
Net change in revolving credit facilities	(1,524)	1,329
Repayment of long-term debt	(1,508)	(1,529)
Distributions to noncontrolling interests	(185)	(176)
Distributions to stockholders	(30)	(2,251)
Payment of debt issuance costs	(12)	(25)
Issuance of common stock	2,506
Income tax benefits	49	56
Other	(22)	3
Net cash (used in) provided by financing activites	(726)	(1,206)
Change in cash and cash equivalents	128	38
Cash and cash equivalents at beginning of period	411	312
Cash and cash equivalents at end of period	539	350
Interest payments	1,043	973
Income tax (refunds) payments, net	$ (36)	$ 400