Benefit Plans	6 Months Ended
Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Benefit Plans	Benefit Plans Prior to the Separation from Pfizer, employees who met certain eligibility requirements participated in various defined benefit pension plans and postretirement plans administered and sponsored by Pfizer. Effective December 31, 2012, our employees ceased to participate in the Pfizer U.S. qualified defined benefit and U.S. retiree medical plans, and liabilities associated with our employees under these plans were retained by Pfizer. Pfizer is continuing to credit certain employees' service with Zoetis generally through December 31, 2017 (or termination of employment from Zoetis, if earlier) for certain early retirement benefits with respect to Pfizer's U.S. defined benefit pension and retiree medical plans. In connection with the employee matters agreement, Zoetis will be responsible for payment of three-fifths of the total cost of the service credit continuation (approximately $38 million) for these plans and Pfizer will fund the remaining two-fifths of the total cost (approximately $25 million). The $25 million capital contribution from Pfizer and corresponding contra-equity account (which will be reduced as the service credit continuation is incurred), is included in Employee benefit plan contribution from Pfizer Inc. in the Condensed Consolidated and Combined Statements of Equity at June 30, 2013. The amount of the service cost continuation payment to be paid by Zoetis to Pfizer was determined and fixed based on an actuarial assessment of the value of the grow-in benefits and will be paid in equal installments over a period of ten years. Pension and postretirement benefit expense associated with the extended service for certain employees in the U.S. plans, totaled approximately $2 million and $4 million for the three and six months ended June 30, 2013, respectively. Prior to the Separation from Pfizer, employees in the U.S. who met certain eligibility requirements participated in a supplemental (non-qualified) savings plan sponsored by Pfizer. In the second quarter of 2013, Pfizer transferred the supplemental savings plan liability of approximately $14 million, cash of $9 million and a deferred tax asset of $5 million associated with employees transferred to us. As part of the Separation, certain Separation Adjustments (see Note 2B. The Separation, Adjustments Associated with the Separation, Senior Notes Offering, Initial Public Offering and Exchange Offer: Adjustments Associated with the Separation) were made to transfer the assets and liabilities of certain international defined benefit pension plans including Austria, France, Germany, Greece, Italy, Mexico, South Africa, Taiwan and Thailand, to Zoetis in the first quarter of 2013, and we assumed the liabilities allocable to employees transferring to us. Prior to the Separation, these benefit plans were accounted for as multi-employer plans. Also, as part of the Separation Adjustments, a benefit plan in Germany was retained by Pfizer. The net obligation of the transferred plans totaled $25 million. At June 30, 2013, the projected benefit obligation and fair value of plan assets of the dedicated international pension plans in the Netherlands, Germany, India and Korea, as well as those plans transferred in the first quarter of 2013, were $64 million and $35 million, respectively. In the second quarter of 2013, a net liability of approximately $16 million was recognized for the pension obligations less the fair value of plan assets associated with additional defined benefit pension plans in certain international locations that will be transferred to us in 2014, in accordance with the applicable local separation agreements. Pension expense associated with dedicated international pension plans was approximately $1 million and $2 million for the three and six months ended June 30, 2013, respectively. Pension expense associated with international benefit plans accounted for as multi-employer plans was approximately $2 million and $5 million for the three and six months ended June 30, 2013, respectively. For the second quarter ended June 30, 2013, contributions to the dedicated international benefits plans and the international plans accounted for as multi-employer plans were $1 million and $3 million, respectively. For the six months ended June 30, 2013, contributions to the dedicated international benefits plans and the international plans accounted for as multi-employer plans were $1 million and $5 million, respectively. We expect to contribute approximately $8 million to these plans in 2013.

Benefit Plans

Prior to the Separation from Pfizer, employees who met certain eligibility requirements participated in various defined benefit pension plans and postretirement plans administered and sponsored by Pfizer. Effective December 31, 2012, our employees ceased to participate in the Pfizer U.S. qualified defined benefit and U.S. retiree medical plans, and liabilities associated with our employees under these plans were retained by Pfizer. Pfizer is continuing to credit certain employees' service with Zoetis generally through December 31, 2017 (or termination of employment from Zoetis, if earlier) for certain early retirement benefits with respect to Pfizer's U.S. defined benefit pension and retiree medical plans. In connection with the employee matters agreement, Zoetis will be responsible for payment of three-fifths of the total cost of the service credit continuation (approximately $38 million) for these plans and Pfizer will fund the remaining two-fifths of the total cost (approximately $25 million). The $25 million capital contribution from Pfizer and corresponding contra-equity account (which will be reduced as the service credit continuation is incurred), is included in Employee benefit plan contribution from Pfizer Inc. in the Condensed Consolidated and Combined Statements of Equity at June 30, 2013. The amount of the service cost continuation payment to be paid by Zoetis to Pfizer was determined and fixed based on an actuarial assessment of the value of the grow-in benefits and will be paid in equal installments over a period of ten years. Pension and postretirement benefit expense associated with the extended service for certain employees in the U.S. plans, totaled approximately $2 million and $4 million for the three and six months ended June 30, 2013, respectively.

Prior to the Separation from Pfizer, employees in the U.S. who met certain eligibility requirements participated in a supplemental (non-qualified) savings plan sponsored by Pfizer. In the second quarter of 2013, Pfizer transferred the supplemental savings plan liability of approximately $14 million, cash of $9 million and a deferred tax asset of $5 million associated with employees transferred to us.

As part of the Separation, certain Separation Adjustments (see Note 2B. The Separation, Adjustments Associated with the Separation, Senior Notes Offering, Initial Public Offering and Exchange Offer: Adjustments Associated with the Separation) were made to transfer the assets and liabilities of certain international defined benefit pension plans including Austria, France, Germany, Greece, Italy, Mexico, South Africa, Taiwan and Thailand, to Zoetis in the first quarter of 2013, and we assumed the liabilities allocable to employees transferring to us. Prior to the Separation, these benefit plans were accounted for as multi-employer plans. Also, as part of the Separation Adjustments, a benefit plan in Germany was retained by Pfizer. The net obligation of the transferred plans totaled $25 million. At June 30, 2013, the projected benefit obligation and fair value of plan assets of the dedicated international pension plans in the Netherlands, Germany, India and Korea, as well as those plans transferred in the first quarter of 2013, were $64 million and $35 million, respectively. In the second quarter of 2013, a net liability of approximately $16 million was recognized for the pension obligations less the fair value of plan assets associated with additional defined benefit pension plans in certain international locations that will be transferred to us in 2014, in accordance with the applicable local separation agreements.

Pension expense associated with dedicated international pension plans was approximately $1 million and $2 million for the three and six months ended June 30, 2013, respectively. Pension expense associated with international benefit plans accounted for as multi-employer plans was approximately $2 million and $5 million for the three and six months ended June 30, 2013, respectively.

For the second quarter ended June 30, 2013, contributions to the dedicated international benefits plans and the international plans accounted for as multi-employer plans were $1 million and $3 million, respectively. For the six months ended June 30, 2013, contributions to the dedicated international benefits plans and the international plans accounted for as multi-employer plans were $1 million and $5 million, respectively. We expect to contribute approximately $8 million to these plans in 2013.