Income Taxes (Components of income tax expense and reconciliation of effective tax rate) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Current
Federal	$ 10		$ 0		$ 0
Foreign	39		27		22
State and local	2		2		2
Current income tax expense	51		29		24
Deferred
Federal	149		(22)		36
Foreign	4		2		1
State and local	14		4		2
Deferred income tax expense (benefit)	167		(16)		39
Total	218		13		63
Income Tax Reconciliation [Line Items]
Computed tax at statutory tax rate	212		31		57
State income taxes, net of federal tax benefit (1)	15	[1]	5	[1]	3	[1]
Non-deductible expenses and other (2)	8	[2]	(8)	[2]	12	[2]
Foreign taxes	(17)		(15)		(9)
Income tax reconciliation, acquisition related expense			8
Income tax reconciliation, nondeductible expense, foreign tax benefits			6
Income tax reconciliation, nondeductible expense, transfer price benefit			2
Income tax reconciliation, nondeductible expense, adjustment of federal and state deferred tax liabilities					3
RSC [Member]
Income Tax Reconciliation [Line Items]
Income tax reconciliation, nondeductible expense, business acquisition					$ 6

[1] 2012 state income taxes, net of federal tax benefit includes $8 of expense primarily related to the write-off of certain state deferred tax assets as a result of the RSC acquisition.

[2] 2012 non-deductible expenses and other includes a $6 Canadian tax benefit due to settlements with the Canadian Revenue Authority and a $2 transfer pricing tax benefit. 2011 non-deductible expenses and other includes $6 due to the non-deductibility of certain costs associated with the proposed RSC acquisition and $3 related to an adjustment of federal and state deferred tax liabilities.