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Long-term debt and current portion of long-term debt (Details 1) - EUR (€) € in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings | € 24,707 | € 27,239
Current portion of non-current borrowings | 2,286 | 3,279
Non-current portion of non-current borrowings | € 20,179 | 20,564
Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings, maturity | 2018–2032 |
Borrowings | € 4,001 |
Non-current portion of non-current borrowings | € 3,200 |
Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings, maturity | 2018–2043 |
Borrowings | € 17,965 | 19,003
Non-current portion of non-current borrowings | € 16,520 |
Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings, maturity | 2018–2032 |
Borrowings | € 112 |
Non-current portion of non-current borrowings | € 72 |
Convertible bonds issued {Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings, maturity | 2022 |
Borrowings | € 387 |
Non-current portion of non-current borrowings | 387 |
Long-term debt and current portion of long-term debt [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Borrowings | 22,465 | 23,843
Non-current portion of non-current borrowings | 20,179 | € 20,564
Not later than one year [member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 2,286 |
Not later than one year [member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 801 |
Not later than one year [member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 1,445 |
Not later than one year [member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 40 |
Later than one year and not later than two years [member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 3,821 |
Later than one year and not later than two years [member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 1,290 |
Later than one year and not later than two years [member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 2,486 |
Later than one year and not later than two years [member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 45 |
Later than two years and not later than three years [member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 3,103 |
Later than two years and not later than three years [member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 729 |
Later than two years and not later than three years [member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 2,371 |
Later than two years and not later than three years [member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 3 |
Later than three years and not later than four years [member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 1,278 |
Later than three years and not later than four years [member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 341 |
Later than three years and not later than four years [member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 934 |
Later than three years and not later than four years [member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 3 |
Later than four years and not later than five years [member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 1,230 |
Later than four years and not later than five years [member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 143 |
Later than four years and not later than five years [member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 697 |
Later than four years and not later than five years [member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 3 |
Later than four years and not later than five years [member] | Convertible bonds issued {Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 387 |
Later than Five Years [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 10,747 |
Later than Five Years [Member] | Unsecured Bank Loans Received [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 697 |
Later than Five Years [Member] | Ordinary Bonds Issued [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | 10,032 |
Later than Five Years [Member] | Other Borrowings [Member] |  |
DisclosureOfBorrowingsExplanatoryLineItems [Line Items] |  |
Non-current portion of non-current borrowings | € 18 |

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