Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Provision for Income Taxes

Our “Provision for income taxes” consisted of the following (in millions):

	Years Ended December 31,
	2013			2012		2011
Current:
Federal	$	389		$	268	$	240
State		79			72		38
Foreign		45			36		35
		513			376		313
Deferred:
Federal		(82	)		48		162
State		(14	)		17		36
Foreign		(53	)		2		—
		(149	)		67		198
Provision for income taxes	$	364		$	443	$	511

U.S. Federal Statutory Income Tax Rate Reconciled to Effective Rate

The U.S. federal statutory income tax rate is reconciled to the effective income tax rate as follows:

	Years Ended December 31,
	2013			2012			2011
Income tax expense at U.S. federal statutory rate		35.00	%		35.00	%		35.00	%
Federal tax credits		(11.74	)		(4.13	)		(3.29	)
Taxing authority audit settlements and other tax adjustments		(3.47	)		(0.02	)		(0.47	)
Noncontrolling interests		(2.28	)		(1.16	)		(1.11	)
State and local income taxes, net of federal income tax benefit		9.81			3.85			3.46
Tax rate differential on foreign income		2.11			(0.96	)		(0.70	)
Tax impact of impairments		41.95			0.57			—
Other		2.37			0.80			0.72
Provision for income taxes		73.75	%		33.95	%		33.61	%

Income Before Income Taxes Showing Domestic and Foreign Sources

For financial reporting purposes, income (loss) before income taxes showing domestic and foreign sources was as follows (in millions):

	Years Ended December 31,
	2013			2012		2011
Domestic	$	548		$	1,175	$	1,394
Foreign		(54	)		128		126
Income before income taxes	$	494		$	1,303	$	1,520

Components of Net Deferred Tax Assets (Liabilities)

The components of net deferred tax assets (liabilities) are as follows (in millions):

	December 31,
	2013			2012
Deferred tax assets:
Net operating loss, capital loss and tax credit carry-forwards	$	164		$	189
Miscellaneous and other reserves, net		356			301
Subtotal		520			490
Valuation allowance		(149	)		(120	)
Deferred tax liabilities:
Landfill and environmental remediation liabilities		(30	)		(11	)
Property and equipment		(966	)		(1,180	)
Goodwill and other intangibles		(1,104	)		(1,050	)
Net deferred tax liabilities	$	(1,729	)	$	(1,871	)

Reconciliation of Beginning and Ending Amount of Gross Unrecognized Tax Benefits, Including Accrued interest

A reconciliation of the beginning and ending amount of gross unrecognized tax benefits, including accrued interest for 2013, 2012 and 2011 is as follows (in millions):

	2013			2012			2011
Balance at January 1	$	54		$	49		$	53
Additions based on tax positions related to the current year		6			15			9
Additions based on tax positions of prior years		—			—			—
Additions due to acquisitions		—			—			2
Accrued interest		2			2			2
Reductions for tax positions of prior years		(7	)		(1	)		—
Settlements		(1	)		(4	)		(10	)
Lapse of statute of limitations		(5	)		(7	)		(7	)
Balance at December 31	$	49		$	54		$	49