Employee Benefits

6 Months Ended

Jun. 30, 2012

Employee Benefits

Employee Benefits

11.   Employee Benefits

The following table provides the components of the net periodic benefit cost for Aon’s U.S. pension plans, along with its most significant international plans, which are located in the U.K., the Netherlands, and Canada (in millions):

	Three months ended June 30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	—		$	—		$	4		$	5
Interest cost	30			31			66			68
Expected return on plan assets	(32		)	(30		)	(81		)	(73		)
Amortization of net actuarial loss	11			7			15			14
Net periodic benefit cost	$	9		$	8		$	4		$	14

	Six months ended June 30,
	U.S.						International
	2012			2011			2012			2011
Service cost	$	—		$	—		$	8		$	10
Interest cost	60			61			132			134
Expected return on plan assets	(64		)	(60		)	(161		)	(144		)
Amortization of net actuarial loss	22			15			29			27
Net periodic benefit cost	$	18		$	16		$	8		$	27

Based on current assumptions, in 2012, Aon plans to contribute $237 million and $304 million to its U.S. and most significant international defined benefit pension plans, respectively.  During the six months ended June 30, 2012, contributions of $52 million have been made to the Company’s U.S. pension plans and $175 million have been made to its most significant international pension plans.