Number of shares of equity interests issued or issuable to acquire entity.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Consideration Transferred, Working Capital Adjustment

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Acquisitions - New Breed Logistics - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			12 Months Ended
	Sep. 02, 2014	Jul. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Acquisition of businesses, net of cash acquired			$ 3,887.0	$ 814.0	$ 458.8
New Breed Logistics
Business Acquisition [Line Items]
Consideration	$ 615.9
Working capital adjustment	1.1
Business combination, consideration transferred, shares of stock	30.1
Acquisition of businesses, net of cash acquired	$ 585.8
Business acquisition, equity interest issued or issuable, number of shares	1,060,598
Common stock, price per share (in usd per share)	$ 32.45
Cash consideration	$ 615.8
New Breed Logistics \| Chief Executive Officer
Business Acquisition [Line Items]
Business combination, consideration transferred, shares of stock		$ 30.0
Percentage of common stock acquired	50.00%	50.00%