Operating Expenses (Tables)

6 Months Ended

Jun. 30, 2014

Operating Expenses [Abstract]

Components of Operating Expenses

Operating expenses for the three and six months ended June 30, 2014 and 2013 were (in millions):

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
Salary and service costs	$	2,794.6	$	2,607.1	$	5,417.4	$	5,148.1
Office and general expenses	526.1		506.9		1,015.7		993.0
Merger expenses	1.8		—		8.8		—
Operating expenses	$	3,322.5	$	3,114.0	$	6,441.9	$	6,141.1

For the six months ended June 30, 2014, we incurred $8.8 million of expenses in connection with the proposed merger with Publicis, which were primarily comprised of professional fees. On May 8, 2014, the proposed merger with Publicis was terminated.