the company financed the acquisition with the proceeds from a $ 1.0 billion three-year term loan credit facility , $ 1.5 billion in unsecured notes , and the issuance of 61 million shares of aon common stock . in addition , as part of the consideration , certain outstanding hewitt stock options were converted into options to purchase 4.5 million shares of aon common stock . these items are detailed further in note 9 2018 2018debt 2019 2019 and note 12 2018 2018stockholders 2019 equity 2019 2019