Capital Structure (Tables)

6 Months Ended

Jun. 30, 2015

Text Block [Abstract]

Schedule of Changes in Stockholders' Deficit and Equity

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

	Equity (Deficit) Attributable to HCA Holdings, Inc.														Equity Attributable to Noncontrolling Interests			Total
	Common Stock					Capital in Excess of Par Value			Accumulated Other Comprehensive Loss			Retained Deficit
	Shares			Par Value
Balances at December 31, 2014		420.478		$	4	$	—		$	(323	)	$	(7,575	)	$	1,396		$	(6,498	)
Comprehensive income		—			—		—			33			1,098			287			1,418
Repurchase of common stock		(12.552	)		—		(297	)		—			(643	)		—			(940	)
Distributions		—			—		—			—			—			(237	)		(237	)
Share-based benefit plans		8.423			—		311			—			—			—			311
Other		—			—		(14	)		—			—			5			(9	)
Balances at June 30, 2015		416.349		$	4	$	—		$	(290	)	$	(7,120	)	$	1,451		$	(5,955	)

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, 2014	$	13		$	(36	)	$	(174	)	$	(126	)	$	(323	)
Unrealized losses on available-for-sale securities, net of $1 income tax benefit		(3	)		—			—			—			(3	)
Foreign currency translation adjustments, net of $5 of income taxes		—			8			—			—			8
Change in fair value of derivative instruments, net of $11 income tax benefit		—			—			—			(19	)		(19	)
Expense reclassified into operations from other comprehensive income, net of $3 and $23, respectively, income tax benefits		—			—			8			39			47
Balances at June 30, 2015	$	10		$	(28	)	$	(166	)	$	(106	)	$	(290	)