Discontinued Operations Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 14, 2016	Dec. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intersegment revenues, discontinued operation after disposal	$ 4.0	$ 3.0	$ 8.1	$ 6.9
Intersegment expenses, discontinued operation after disposal	3.0	4.1	8.5	8.9
Assets
Cash and cash equivalents	11.1	$ 9.7	11.1	$ 9.7
Discontinued Operations, Held-for-sale | Customer Communications
Assets
Cash and cash equivalents	11.1		11.1			$ 10.1
Accounts receivable	135.2		135.2			140.1
Investments	0.0		0.0			0.3
Unconsolidated affiliates	0.5		0.5			0.4
Properties, net	44.1		44.1			64.5
Intangible assets, net	19.2		19.2			20.6
Goodwill	24.2		24.2			24.8
Other assets	38.5		38.5			36.7
Total assets held for sale	272.8		272.8			297.5
Liabilities
Current portion of debt	0.5		0.5			0.0
Accounts payable	30.3		30.3			33.7
Accrued compensation and benefits	15.3		15.3			26.7
Deferred revenues and gains	5.0		5.0			5.5
Long-term debt	2.0		2.0			0.0
Income taxes payable	0.5		0.5			0.0
Other liabilities	87.3		87.3			94.0
Total liabilities held for sale	$ 140.9		$ 140.9			$ 159.9
North America | Customer Communications
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration					$ 410.0