Restructuring and Acquisition Related Expenses	3 Months Ended
Mar. 31, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Acquisition Related Expenses	Restructuring and Acquisition Related Expenses Acquisition Related Expenses Acquisition related expenses, which include external costs such as legal, accounting and advisory fees, totaled $2 million and $3 million for the three months ended March 31, 2018 and 2017, respectively. Acquisition related expenses for the three months ended March 31, 2018 consisted of external costs for (i) completed acquisitions, (ii) pending acquisitions as of March 31, 2018, including $1 million related to Stahlgruber, and (iii) potential acquisitions that were terminated. Acquisition related expenses for the three months ended March 31, 2017 consisted of $1 million of costs related to our acquisition of Andrew Page, with the remaining $2 million related to other completed acquisitions and acquisitions that were pending as of March 31, 2017. Acquisition Integration Plans and Restructuring During the three months ended March 31, 2018, we incurred $2 million of restructuring expenses. Expenses incurred during the three months ended March 31, 2018 were primarily related to the integration of our acquisition of Andrew Page. This integration included the closure of duplicate facilities and termination of employees. During the three months ended March 31, 2017, we incurred less than $1 million of restructuring expenses, primarily related to the ongoing integration activities in our Specialty segment. Expenses incurred were primarily related to facility closure and the merger of existing facilities into larger distribution centers. We expect to incur additional expenses related to the integration of certain of our acquisitions into our existing operations in 2018. These integration activities are expected to include the closure of duplicate facilities, rationalization of personnel in connection with the consolidation of overlapping facilities with our existing business, and moving expenses. Future expenses to complete these integration plans are expected to be less than $15 million.

Restructuring and Acquisition Related Expenses

Acquisition Related Expenses

Acquisition related expenses, which include external costs such as legal, accounting and advisory fees, totaled $2 million and $3 million for the three months ended March 31, 2018 and 2017, respectively. Acquisition related expenses for the three months ended March 31, 2018 consisted of external costs for (i) completed acquisitions, (ii) pending acquisitions as of March 31, 2018, including $1 million related to Stahlgruber, and (iii) potential acquisitions that were terminated.

Acquisition related expenses for the three months ended March 31, 2017 consisted of $1 million of costs related to our acquisition of Andrew Page, with the remaining $2 million related to other completed acquisitions and acquisitions that were pending as of March 31, 2017.

Acquisition Integration Plans and Restructuring

During the three months ended March 31, 2018, we incurred $2 million of restructuring expenses. Expenses incurred during the three months ended March 31, 2018 were primarily related to the integration of our acquisition of Andrew Page. This integration included the closure of duplicate facilities and termination of employees.

During the three months ended March 31, 2017, we incurred less than $1 million of restructuring expenses, primarily related to the ongoing integration activities in our Specialty segment. Expenses incurred were primarily related to facility closure and the merger of existing facilities into larger distribution centers.

We expect to incur additional expenses related to the integration of certain of our acquisitions into our existing operations in 2018. These integration activities are expected to include the closure of duplicate facilities, rationalization of personnel in connection with the consolidation of overlapping facilities with our existing business, and moving expenses. Future expenses to complete these integration plans are expected to be less than $15 million.