Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property Plant And Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment consists of the following:

		Estimated useful				December 31,
(in millions)		life-in years				2015				2014
Property and equipment:
Land		N/A				$	6			$	4
Building			39				17				17
Building improvements			15				15				14
Leasehold improvements		1-15					491				478
Equipment and computer software			3				374				387
Other transportation equipment			10				135				56
Furniture and fixtures			7				62				93
Construction in progress		N/A					51				5
Total							1,151				1,054
Less: accumulated depreciation and amortization							570				587
Property and equipment, net						$	581			$	467