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Accounting Pronouncements (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($)
Accounting Changes and Error Corrections [Abstract] |
Rental expense | $ 126.2
Accounting Standards Update 2016-09 | New Accounting Pronouncement, Early Adoption, Effect |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Tax benefits related to share-based payment awards, reduction to long-term deferred tax assets | 45.4
Tax benefits related to share-based payments awards, additional paid-in capital | 3.9
Increase to retained earnings from elimination of amounts in long-term deferred tax assets and additional paid-in capital | $ 49.3

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