Weighted Average Shares Outstanding (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share (Textuals) [Abstract]
Excluded common stock equivalents	22.0	24.0	19.0
Weighted average shares outstanding
Weighted average shares outstanding - basic	1,341.2	1,324.3	1,341.2
Net effect of common stock equivalents	0.0	0.0	0.0
Weighted average shares outstanding - assuming dilution	1,341.2	1,324.3	1,341.2
Employee Stock Option [Member]
Earnings Per Share (Textuals) [Abstract]
Excluded common stock equivalents	2.0	12.0	16.0