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Revenue Reserves (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Analysis of the amount of, and change in, reserves |  |  |
Beginning balance | $ 662.7 | $ 483.8 | $ 426.2
Current provisions relating to sales in current year | 2,668.0 | 2,229.4 | 1,651.8
Adjustments relating to prior years | (16.7) | (32.3) | (16.0)
Payments/returns relating to sales in current year | (2,099.5) | (1,666.6) | (1,237.2)
Payments/returns relating to sales in prior years | (609.0) | (351.6) | (341.0)
Ending balance | 605.5 | 662.7 | 483.8
Discounts |  |  |
Analysis of the amount of, and change in, reserves |  |  |
Beginning balance | 56.1 | 47.6 | 47.0
Current provisions relating to sales in current year | 592.6 | 459.7 | 347.3
Adjustments relating to prior years | (1.4) | (1.3) | (1.0)
Payments/returns relating to sales in current year | (522.5) | (405.9) | (299.7)
Payments/returns relating to sales in prior years | (53.2) | (44.0) | (46.0)
Ending balance | 71.6 | 56.1 | 47.6
Contractual Adjustments |  |  |
Analysis of the amount of, and change in, reserves |  |  |
Beginning balance | 548.7 | 387.1 | 345.5
Current provisions relating to sales in current year | 2,044.5 | 1,732.1 | 1,265.4
Adjustments relating to prior years | 1.5 | (16.3) | (28.5)
Payments/returns relating to sales in current year | (1,576.0) | (1,258.1) | (933.4)
Payments/returns relating to sales in prior years | (536.0) | (296.1) | (261.9)
Ending balance | 482.7 | 548.7 | 387.1
Returns |  |  |
Analysis of the amount of, and change in, reserves |  |  |
Beginning balance | 57.9 | 49.1 | 33.7
Current provisions relating to sales in current year | 30.9 | 37.6 | 39.1
Adjustments relating to prior years | (16.8) | (14.7) | 13.5
Payments/returns relating to sales in current year | (1.0) | (2.6) | (4.1)
Payments/returns relating to sales in prior years | (19.8) | (11.5) | (33.1)
Ending balance | $ 51.2 | $ 57.9 | $ 49.1

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- Definition Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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