Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales by product category
Net Sales	$ 1,125.0	$ 1,137.4	$ 2,265.7	$ 2,253.0
Knees [Member]
Net sales by product category
Net Sales	460.7	470.9	931.3	933.1
Hips [Member]
Net sales by product category
Net Sales	340.0	345.0	684.5	682.3
Extremities [Member]
Net sales by product category
Net Sales	42.5	40.7	87.3	83.6
Reconstructive implants [Member]
Net sales by product category
Net Sales	843.2	856.6	1,703.1	1,699.0
Dental [Member]
Net sales by product category
Net Sales	61.5	67.1	121.7	129.5
Trauma [Member]
Net sales by product category
Net Sales	73.9	69.1	149.4	139.2
Spine [Member]
Net sales by product category
Net Sales	52.4	56.4	105.6	113.3
Surgical and other [Member]
Net sales by product category
Net Sales	$ 94.0	$ 88.2	$ 185.9	$ 172.0