Capital Structure (Tables)

6 Months Ended

Jun. 30, 2018

Text Block [Abstract]

Schedule of Changes in Stockholders' Deficit and Equity

The changes in stockholders’ deficit, including changes in stockholders’ deficit attributable to HCA Healthcare, Inc. and changes in equity attributable to noncontrolling interests, are as follows (dollars and shares in millions):

	Equity (Deficit) Attributable to HCA Healthcare, Inc.
	Common Stock						Accumulated Other Comprehensive Loss			Retained Deficit			Equity Attributable to Noncontrolling Interests			Total
	Shares			Par Value
Balances at December 31, 2017		350.092		$	4		$	(278	)	$	(6,532	)	$	1,811		$	(4,995	)
Comprehensive income		—			—			17			1,964			284			2,265
Repurchase of common stock		(9.040	)		(1	)		—			(892	)		—			(893	)
Dividends and distributions		—			—			—			(250	)		(185	)		(435	)
Share-based benefit plans		5.708			—			—			(18	)		—			(18	)
Dispositions of entities with noncontrolling interests		—			—			—			—			(53	)		(53	)
Other		—			—			—			(3	)		7			4
Balances at June 30, 2018		346.760		$	3		$	(261	)	$	(5,731	)	$	1,864		$	(4,125	)

Components of Accumulated Other Comprehensive Loss

The components of accumulated other comprehensive loss are as follows (dollars in millions):

	Unrealized Gains on Available- for-Sale Securities			Foreign Currency Translation Adjustments			Defined Benefit Plans			Change in Fair Value of Derivative Instruments			Total
Balances at December 31, 2017	$	7		$	(149	)	$	(168	)	$	32		$	(278	)
Unrealized losses on available-for-sale securities, net of $1 income tax benefit		(5	)		—			—			—			(5	)
Foreign currency translation adjustments		—			(22	)		—			—			(22	)
Change in fair value of derivative instruments, net of $11 of income taxes		—			—			—			39			39
Expense (income) reclassified into operations from other comprehensive income, net of $3 income tax benefit and $- income taxes, respectively		—			—			7			(2	)		5
Balances at June 30, 2018	$	2		$	(171	)	$	(161	)	$	69		$	(261	)