Geographic Information (Information by Geographic Area) (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Revenues	$ 544.5	$ 438.3	$ 1,568.0	$ 1,336.2
Property and equipment (including concession assets), net	5,159.5		5,159.5		4,902.4
UNITED STATES
Revenues	301.2	253.5	859.8	753.8
Property and equipment (including concession assets), net	2,764.2		2,764.2		2,626.2
MEXICO
Revenues	243.3	184.8	708.2	582.4
Property and equipment (including concession assets), net	$ 2,395.3		$ 2,395.3		$ 2,276.2

Aggregate revenue recognized during the period (derived from goods sold, services rendered, insurance premiums, or other activities that constitute an entity's earning process). For financial services companies, also includes investment and interest income, and sales and trading gains.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 5

-Section 03

-Paragraph 1

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration