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Costs (Details 6) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Costs
Depreciation, depletion and amortization: - tangible assets	€ 7,199	€ 7,308	€ 8,646
Depreciation, depletion and amortization: - intangible assets	286	253	303
Depreciation and amortisation expense Before Adjustment	7,485	7,561	8,949
- capitalized direct costs associated with self-constructed assets - tangible assets	(2)	(2)	(9)
Total Depreciation And Amortisation Expense	€ 7,483	€ 7,559	€ 8,940

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- Definition

The amount of capitalized construction cost adjusted to depreciation.

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The amount of depreciation and amortization expense before adjustments.

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- Definition

The amount of depreciation and amortization expense of intangible assets before adjustments.

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- Definition

The amount of depreciation and amortization expense of tangible assets before adjustments.

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- Definition

The amount of depreciation and amortisation expense. Depreciation and amortisation are the systematic allocations of depreciable amounts of assets over their useful lives.

+ References

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