Integration and Restructuring Costs (Restructuring Activities) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Reserve [Roll Forward]
Liability at beginning of period	$ 170	$ 181	$ 211
Amounts Accrued	22	78	51
Cash Paid	(65)	(88)	(82)
Other	(3)	(1)
Liability at end of period	124	170	181
Severance [Member]
Restructuring Reserve [Roll Forward]
Liability at beginning of period	36	27
Amounts Accrued	9	46
Cash Paid	(33)	(38)
Other	(1)	1
Liability at end of period	11	36
Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Liability at beginning of period	134	154
Amounts Accrued	13	32
Cash Paid	(32)	(50)
Other	(2)	(2)
Liability at end of period	$ 113	$ 134