Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Property and Equipment

Property and Equipment—Property and equipment is stated at cost.  Depreciation is computed by the straight-line method over estimated useful lives as follows:

Buildings and building improvements	10 to 40 years
Leasehold Improvements	Shorter of lease term or useful life
Equipment and other (including capital leases)	3 to 20 years

At December 31,	2015		2014
Land	$	241	$	240
Buildings	737		717
Capital leases (a)	163		165
Equipment and other	2,102		2,042
	3,243		3,164
Less accumulated depreciation and amortization	1,838		1,731
Net property and equipment	$	1,405	$	1,433

(a) Accumulated amortization of capital leases was $91 million and $78 million at December 31, 2015 and 2014, respectively.

Year Ended December 31,	2015		2014		2013
Depreciation expense, including capitalized lease amortization (a)	$	240	$	249	$	251

(a) Amortization expense related to capital leases was $16 million in 2015 and $17 million in each of 2014 and 2013.

Reconciliation from Basic to Diluted Shares

The table below presents a reconciliation of weighted average shares used in the calculation of basic and diluted EPS.

Year Ended December 31,	2015	2014	2013
(in millions)
Weighted average shares for basic EPS	484	550	608
Dilutive effect of shares issuable under stock-based compensation plans	5	11	16
Weighted average shares for diluted EPS	489	561	624