Contingencies and Environmental Liabilities - NuvaRing Litigation - Textual (Detail) (NuvaRing)	Sep. 30, 2012 LegalMatter
Loss Contingencies [Line Items]
Loss contingency, pending claims number	1,220
New Jersey state court [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	185
Initial number of cases selected for review	20
Other State Court [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	5
NuvaRing MDL | Federal [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	1,030
Initial number of cases selected for review	20
Subsequent number of cases selected for review	8