Stock Compensation - Exercise Price Range (Details) - Employee Stock Option - Long-term incentive and director compensation plans - $ / shares	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	$ 14.47
Exercise Price Range, Maximum	$ 71.27
Number Outstanding (Shares)	52,265,788	56,773,983
Weighted Average Remaining Contractual Life (Years)	6 years 7 months 6 days
Options Outstanding Weighted Average Exercise Price per Share	$ 41.89	$ 37.45
Number Exercisable (Shares)	24,017,386
Options Exercisable Weighted Average Exercise Price per Share	$ 33.16
Range Of Exercise Prices $14.47 to $20.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	14.47
Exercise Price Range, Maximum	$ 20.00
Number Outstanding (Shares)	1,996,801
Weighted Average Remaining Contractual Life (Years)	2 years 1 month 6 days
Options Outstanding Weighted Average Exercise Price per Share	$ 14.96
Number Exercisable (Shares)	1,996,801
Options Exercisable Weighted Average Exercise Price per Share	$ 14.96
Range Of Exercise Prices $20.01 to $30.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	20.01
Exercise Price Range, Maximum	$ 30.00
Number Outstanding (Shares)	5,130,177
Weighted Average Remaining Contractual Life (Years)	2 years 7 months 6 days
Options Outstanding Weighted Average Exercise Price per Share	$ 24.59
Number Exercisable (Shares)	5,130,177
Options Exercisable Weighted Average Exercise Price per Share	$ 24.59
Range Of Exercise Prices $30.01 to $40.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	30.01
Exercise Price Range, Maximum	$ 40.00
Number Outstanding (Shares)	14,126,454
Weighted Average Remaining Contractual Life (Years)	5 years 3 months 18 days
Options Outstanding Weighted Average Exercise Price per Share	$ 33.06
Number Exercisable (Shares)	11,328,597
Options Exercisable Weighted Average Exercise Price per Share	$ 33.12
Range Of Exercise Prices $40.01 to $50.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	40.01
Exercise Price Range, Maximum	$ 50.00
Number Outstanding (Shares)	9,854,196
Weighted Average Remaining Contractual Life (Years)	7 years 1 month 6 days
Options Outstanding Weighted Average Exercise Price per Share	$ 44.10
Number Exercisable (Shares)	3,544,639
Options Exercisable Weighted Average Exercise Price per Share	$ 44.10
Range Of Exercise Prices $50.01 to $60.00
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	50.01
Exercise Price Range, Maximum	$ 60.00
Number Outstanding (Shares)	21,103,396
Weighted Average Remaining Contractual Life (Years)	8 years 7 months 6 days
Options Outstanding Weighted Average Exercise Price per Share	$ 53.44
Number Exercisable (Shares)	2,017,172
Options Exercisable Weighted Average Exercise Price per Share	$ 53.96
Range Of Exercise Prices $60.01 to $71.27
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise Price Range, Minimum	60.01
Exercise Price Range, Maximum	$ 71.27
Number Outstanding (Shares)	54,764
Weighted Average Remaining Contractual Life (Years)	9 years 8 months 12 days
Options Outstanding Weighted Average Exercise Price per Share	$ 71.00
Number Exercisable (Shares)	0
Options Exercisable Weighted Average Exercise Price per Share	$ 0