IDoc Split with out BPM using SplitByValue at the LineItem Level

Question

I have an Invoice idoc contains line item and identifier changes into groups, let's say A & B
Using Message Mapping, Will i be able to Split into 2 IDOCs and combine A into one IDOC and B into Another IDOC and send it across to ECC with out using BPM?
Btw the header is commom for both the IDOCs
Source
<Header>
<headertext>headername</headertext>
<lineItem>
<item1>A</item1>
<item2>B</item2>
<item3>A</item3>
<item3>B</item4>
</item>
</lineitem>
</header>
Target
IDOC 1
<Header>
<headertext>headername</headertext>
<lineItem>
<item1>A</item1>
<item2>A</item2>
</item>
</lineitem>
</header>
IDOC 2
<Header>
<headertext>headername</headertext>
<lineItem>
<item1>B</item1>
<item2>B</item2>
</item>
</lineitem>
</header>
Any inputs are appreciated

Answer 1

I actually gave wrong information on the source structure, I am trying to execute scenario with the given examples, meanwhile any help is appreciated
<Header>
               <Date>20100112</Date>
               <Amount>10</Amount>
               <No>20</No>
</Header>
            <InvoiceItem>
               <Line1>10</Line1>
               <Line2>10</Line2>
               <Amount>10</Amount>
               <ActionIndicator>I</ActionIndicator>
            </InvoiceItem>
            <InvoiceItem>
               <Line1>20</Line1>
               <Line2>20</Line2>
               <Amount>20</Amount>
               <ActionIndicator>C</ActionIndicator>
            </InvoiceItem>
            <InvoiceItem>
               <Line1>30</Line1>
               <Line2>30</Line2>
               <Amount>30</Amount>
               <ActionIndicator>I</ActionIndicator>
            </InvoiceItem>
            <InvoiceItem>
               <Line1>40</Line1>
               <Line2>40</Line2>
               <Amount>40</Amount>
               <ActionIndicator>C</ActionIndicator>
            </InvoiceItem>
Target 1
<Header>
               <Date>20100112</Date>
               <Amount>10</Amount>
               <tNo>20</No>
               <ActionIndicator>I</ActionIndicator>
</Header>
               <InvoiceItem>
               <Line1>10</Line1>
               <Line2>10</Line2>
               <Amount>10</Amount>
            </InvoiceItem>
            <InvoiceItem>
               <Line1>30</Line1>
               <Line2>30</Line2>
               <Amount>30</Amount>
            </InvoiceItem>
Target 2
<Header>
               <Date>20100112</Date>
               <Amount>10</Amount>
               <tNo>20</No>
               <ActionIndicator>I</ActionIndicator>
</Header>
               <InvoiceItem>
               <Line1>20</Line1>
               <Line2>20</Line2>
               <Amount>20</Amount>
            </InvoiceItem>
            <InvoiceItem>
               <Line1>40</Line1>
               <Line2>40</Line2>
               <Amount>40</Amount>
            </InvoiceItem>
I know the part of Splitting IDOC, which was executing correctly, with the external data type changes. Please advice