Segment and Geographic Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenue, Major Customer [Line Items]
Total revenues	$ 6,915.9	$ 6,905.4	$ 13,462.5	$ 13,017.0
Operating Income	2,155.0	2,189.1	4,119.6	4,015.0
U.S.
Revenue, Major Customer [Line Items]
Total revenues	2,242.3	2,168.7	4,344.6	4,094.5
Operating Income	972.1	952.0	1,843.4	1,745.0
Europe
Revenue, Major Customer [Line Items]
Total revenues	2,741.2	2,822.5	5,276.7	5,262.5
Operating Income	807.2	833.4	1,506.5	1,508.7
APMEA
Revenue, Major Customer [Line Items]
Total revenues	1,547.9	1,509.7	3,104.5	2,910.2
Operating Income	358.8	365.6	742.7	713.6
Other Countries & Corporate
Revenue, Major Customer [Line Items]
Total revenues	384.5	404.5	736.7	749.8
Operating Income	$ 16.9	$ 38.1	$ 27.0	$ 47.7