Basis of Presentation and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2013

Basis Of Presentation And Summary Of Significant Accounting Policies Tables [Abstract]

Reconciliation from basic to diluted shares [Table Text Block]

		Three Months Ended
		March 31,
(in millions)			2013	2012
Weighted average shares for basic EPS			621	650
Dilutive effect of shares issuable under stock-based
	compensation plans		17	17
Weighted average shares for diluted EPS			638	667