v3.25.2
Significant acquisition of businesses (Details 3) - USD ($)
$ in Millions
 6 Months Ended
Jun. 25, 2025
Apr. 03, 2025
Jun. 30, 2025
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Identifiable net assets acquired through acquisitions applying the optional concentration test     $ 1,792.0
Property, plant and equipment recognised as of acquisition date      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     4.0
Right of use assets as of acquisition date      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     8.0
Acquired research and development intangible assets recognised as of acquisition date      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     1,664.0
Deferred tax assets      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     125.0
Non-current financial and other assets      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     14.0
Trade receivables and other current assets recognised as of acquisition date      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Assets other than cash or cash equivalents in subsidiary or businesses acquired or disposed     10.0
Cash and cash equivalents recognised as of acquisition date      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Cash and cash equivalents in subsidiary or businesses acquired or disposed     70.0
Cash and cash equivalents recognised as of acquisition date | Regulus Therapeutics Inc.      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Cash and cash equivalents in subsidiary or businesses acquired or disposed $ 23.0    
Cash and cash equivalents recognised as of acquisition date | Anthos Therapeutics Inc.      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Cash and cash equivalents in subsidiary or businesses acquired or disposed   $ 47.0  
Current and non-current lease liabilities      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Liabilities in subsidiary or businesses acquired or disposed     (8.0)
Trade payables and other liabilities      
Amounts recognised as of acquisition date for each major class of assets acquired and liabilities assumed [line items]      
Liabilities in subsidiary or businesses acquired or disposed     $ (95.0)