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v3.19.2

Financing arrangements (Details Textual) - Notes [Member] | Jun. 30, 2019
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4.563% 2048 Notes [Member] |
Debt Instrument [Line Items] |
Interest rate, stated percentage | 4.563%
Effective interest rate | 6.30%
4.663% 2051 Notes [Member] |
Debt Instrument [Line Items] |
Interest rate, stated percentage | 4.663%
Effective interest rate | 5.60%

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