Contingencies and Environmental Liabilities - NuvaRing Litigation - Textual (Detail) (NuvaRing [Member])	Dec. 31, 2012 LegalMatter
Loss Contingencies [Line Items]
Loss contingency, pending claims number	1,315
New Jersey state court [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	200
Initial number of cases selected for review	9
Other State Court [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	5
NuvaRing MDL [Member] | Federal [Member]
Loss Contingencies [Line Items]
Loss contingency, pending claims number	1,105
Initial number of cases selected for review	20
Subsequent number of cases selected for review	8