Weighted Average Shares Outstanding (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share (Tables) [Abstract]

Weighted average shares outstanding

	Year Ended December 31,
(in millions)	2013	2012	2011
Weighted average shares outstanding - basic	1,341.2	1,406.7	1,509.3
Net effect of common stock equivalents	—	—	9.7
Weighted average shares outstanding - assuming dilution	1,341.2	1,406.7	1,519.0