XML 104 R91.htm IDEA: XBRL DOCUMENT v3.8.0.1
Employee Benefits - Stock Options (Details) - Stock Option
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Number of Shares [Roll Forward]  
Outstanding at December 31, 2016 | shares 23,157
Granted | shares 6,056
Granted-replacement awards | shares 8,047
Forfeited | shares (275)
Expired | shares (63)
Exercised | shares (6,702)
Outstanding at December 31, 2017 | shares 30,220
Exercisable at December 31, 2017 | shares 16,112
Expected to vest, net of estimated forfeitures at December 31, 2017 | shares 13,314
Share-based Compensation Arrangement by Share-based Payment Award, Option, Weighted Average Exercise Price [Roll Forward]  
Outstanding at December 31, 2016 | $ / shares $ 37.69
Granted | $ / shares 71.75
Granted-replacement awards | $ / shares 23.68
Forfeited | $ / shares 64.66
Expired | $ / shares 82.50
Exercised | $ / shares 21.99
Outstanding at December 31, 2017 | $ / shares 43.93
Exercisable at December 31, 2017 | $ / shares 35.78
Expected to vest, net of estimated forfeitures at December 31, 2017 | $ / shares $ 52.94
Additional Disclosures [Abstract]  
Outstanding at December 31, 2017, Weighted-Average Remaining Contractual Term 5 years 10 months 20 days
Expected to vest, net of estimated forfeitures at December 31, 2017, Weighted-Average Remaining Contractual Term 3 years 7 months 9 days
Expected to vest, net of estimated forfeitures at December 31, 2017, Weighted-Average Remaining Contractual Term 8 years 5 months 19 days
Outstanding at December 31, 2017, Aggregate Intrinsic Value | $ $ 921
Exercisable at December 31, 2017, Aggregate Intrinsic Value | $ 624
Expected to vest, net of estimated forfeitures at December 31, 2017, Aggregate Intrinsic Value | $ $ 285