Commitments and Contingencies (Award Proceedings in Relation to Domination Agreement and Squeeze-Out Narrative) (Details) (Domination Agreement and Squeeze-Out [Member], EUR €) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2011	Sep. 30, 2011 Previous [Member]	Jan. 28, 2014 Subsequent [Member]	Sep. 30, 2011 Subsequent [Member]
Loss Contingencies [Line Items]
Number of legal actions	2
Domination agreement compensation, shares		145,387
Domination agreement compensation, per share			€ 41.92	€ 49.43	€ 51.86
Domination agreement compensation, value		€ 2
Guaranteed dividends, per share			€ 2.89	€ 3.61	€ 3.79
Guaranteed dividends, value		€ 1