Following in the slipstream of its Big Four peers, Commonwealth Bank is also starting to feel the need to slim down, as these items from yesterday's 2017/18 profit announcements indicated.On 25 June 2018, the CBA Group announced a "strategic review" of its general insurance business.On 21 September 2017, it announced the sale of 100 per cent of CBA's life insurance businesses in Australia and New Zealand to AIA Group Limited for A$3.8 billion.On 23 May 2018, the group announced the sale of its 37.5 per cent equity interest in BoComm Life Insurance Company Limited to Mitsui Sumitomo Insurance Co for RMB3.2 billion ($668 million).CBA said the transaction was expected to result in an indicative after tax gain on sale of approximately $450 million (this will not be included in cash profit), and to be completed in calendar year 2018, subject to regulatory approval. In yesterday's results presentation, Matt Comyn, Group CEO, also announced that the CBA Board had approved the sale of Commonwealth Bank of South Africa (Holding Company) Limited, through which CBA owns 90 per cent of fintech Tyme Digital, to its minority shareholder, African Rainbow Capital - subject to regulatory approval and potential sale price adjustments.Tyme Digital forms part of the group's International Financial Services division and is treated as a discontinued operation within this division. Tyme Digital reported a net loss after tax of $78 million for FY18.Also on 25 June 2018, the group announced its intention to demerge its wealth management and mortgage broking businesses. This will involve the creation of a new wealth management and mortgage broking company.These businesses are classified as continuing operations because the demerger is not expected to be completed until 2019.