Property and Equipment - Additional Information (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Property, Plant and Equipment [Abstract] | |||
Depreciation | $ 313us-gaap_DepreciationNonproduction | $ 318us-gaap_DepreciationNonproduction | $ 290us-gaap_DepreciationNonproduction |
Net capital lease assets included in property and equipment | 149us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet | 130us-gaap_CapitalLeasesBalanceSheetAssetsByMajorClassNet | |
Accumulated depreciation and amortization of capital lease assets included in property and equipment | $ 64us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation | $ 59us-gaap_CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation |
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- Definition
The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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