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Weighted Average Shares Outstanding (Details) - shares
shares in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Weighted average shares outstanding - basic 1,365.4 1,350.4
Weighted Average Number Diluted Shares Outstanding Adjustment 24.8 19.5
Weighted average shares outstanding - assuming dilution 1,390.2 1,369.9
Stock Issued During Period, Shares, New Issues 7.0 8.0
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 4.0 1.0