Acquisitions (Details Textual 1) - RONA inc [Member] shares in Millions, $ in Millions	May 20, 2016 USD ($) shares
Noncontrolling Interest [Line Items]
Noncontrolling interest, amount represented by preferred stock | $	$ 109
Noncontrolling Interest [Member] | Preferred Class A [Member]
Noncontrolling Interest [Line Items]
Preferred shares outstanding	6.9
Noncontrolling Interest [Member] | Series 6 Shares [Member]
Noncontrolling Interest [Line Items]
Preferred shares outstanding	4.7
Noncontrolling Interest [Member] | Series 7 Shares [Member]
Noncontrolling Interest [Line Items]
Preferred shares outstanding	2.2