Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

Property and equipment consisted of the following as of December 31, 2015 and 2014 (in millions, except years):

	As of December 31,						Depreciation Period (Years)
	2015			2014
Software and internally developed software	$	474		$	377		1 to 3
Computer and network equipment	410			247			1 to 4
Land	138			138			N/A
Buildings and building improvements	188			150			2.5 to 40
Leasehold improvements	216			202			1 to 17
Equipment, aircraft and office furniture	197			187			1 to 15
	1,623			1,301
Less accumulated depreciation and amortization	(586		)	(427		)
Property and equipment, net	$	1,037		$	874