Incentive Stock Programs (Details) $ / shares in Units, $ in Millions	6 Months Ended
Jun. 30, 2016 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award
Incentive stock programs, shares reserved for future grants	56,000,000
Total unrecognized compensation cost \| $	$ 280
Total unrecognized compensation cost, recognition period	3 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Grants in period, stock options (in shares)	7,699,301
Stock options outstanding, number of shares	38,184,610
Stock options outstanding, weighted-average remaining life	5 years 6 months
Stock options outstanding, weighted-average exercise price (in dollars per share) \| $ / shares	$ 33.66
Aggregate intrinsic value of options outstanding \| $	$ 260
Exercisable options, number of shares	25,540,864
Exercisable options, weighted-average remaining life	3 years 8 months 12 days
Exercisable options, weighted-average exercise price (in dollars per share) \| $ / shares	$ 30.05
Aggregate intrinsic value of options exercisable \| $	$ 252
Restricted stock awards
Share-based Compensation Arrangement by Share-based Payment Award
Awards and units granted during period (in shares)	776,510
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award
Awards and units granted during period (in shares)	7,341,273

Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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