Refer to Note 3 of the consolidated financial statements for information pertaining to accounting changes effective during 2013—2014, and for information on issued accounting pronouncements that will be effective in future years.
Our discussion and analysis of our financial condition and results of operations are based upon our consolidated financial statements, which have been prepared in accordance with IFRS. Our significant accounting policies and accounting estimates are contained in the consolidated financial statements (see Note 2 for our description of significant accounting policies and Note 4 for more information about our critical accounting estimates).
Some of these policies involve critical accounting estimates because they require us to make subjective or complex judgments about matters that are uncertain by nature and because changes to these judgments could have a material impact on our financial statements. The following are our main critical accounting estimates: the principles of consolidation, the criteria used to determine whether an arrangement qualifies as an operating lease or a finance lease, the assumptions required, such as mortality rates, to estimate our pension and other post-employment benefits and the determination of components of our property and equipment.
We have discussed the development, selection and application of our key accounting policies and the critical accounting estimates and the assumptions they require with our senior management and the Audit Committee.
At March 31, 2014, the Corporation held an 10.41% voting interest in Sirius XM through its investment in 17,856,787 Class A subordinate voting shares.
Our key management personnel have authority and responsibility for overseeing, planning, directing and controlling our activities and consist of our Board of Directors and Senior Executive Team. See Note 28 of the consolidated financial statements for additional details.
We made employer contributions to defined benefit plans as discussed in Note 17. We also provided management and administrative services to our defined benefit pension plans.