Supplemental Cash Flow Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Cash paid for interest	$ 130.6		$ 138.9		$ 139.8
Cash paid for income taxes, net of refunds	95.7	[1]	102.0	[1]	87.3	[1]
Proceeds from Income Tax Refunds	$ 23.5		$ 25.4		$ 28.7

[1] Refunds of $23.5, $25.4 and $28.7 were received for the years ended December 31, 2012, 2011 and 2010, respectively.