Agreements and Transactions with Baxter (Narrative) (Details) - USD ($) $ in Millions	7 Months Ended	12 Months Ended
Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Selling, general and administrative		$ 3,015.2	$ 1,842.5	$ 1,782.0
Inventories	$ 3,562.3	3,562.3	635.4
Prepaid expenses and other current assets	806.3	806.3	197.4
Other current liabilities	362.9	362.9	$ 142.8
Tax indemnification	26.0	26.0
Prepaid expenses and other current assets related indemnification liabilities	189.0	189.0
Other non current assets	34.0	34.0
Current tax related indemnification liabilities	72.0	72.0
Long -term tax related indemnification liabilities	92.0	92.0
Manufacturing and Supply Agreement with Baxter
Related Party Transaction [Line Items]
Revenue	81.0
Transition Service Agreement with Baxter
Related Party Transaction [Line Items]
Selling, general and administrative	54.0
Operations Not Yet Transferred to Baxalta
Related Party Transaction [Line Items]
Revenue	101.0
Inventories	11.0	11.0
Prepaid expenses and other current assets	50.0	50.0
Other current liabilities	$ 3.0	$ 3.0

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.6(a))
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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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