Goodwill and Other Intangible Assets (Annual Goodwill Impairment Test) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Oct. 31, 2013 reporting_units	Mar. 31, 2013
Goodwill [Line Items]
Goodwill	$ 1,277,266		$ 1,195,613
Distribution Business Segment [Member]
Goodwill [Line Items]
Number of reporting units		20
Number of reporting units, applied step 0 of goodwill impairment test		20
Goodwill	1,080,051		998,128
All Other Operations Business Segment [Member]
Goodwill [Line Items]
Number of reporting units		6
Number of reporting units, applied step 0 of goodwill impairment test		4
Number of reporting units, applied step 1 of goodwill impairment test		2
Goodwill	197,215		197,485
All Other Operations Business Segment [Member] | Refrigerants Reporting Unit [Member]
Goodwill [Line Items]
Goodwill	$ 88,000