Guarantor Financial Information (Condensed Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 528.8	$ 135.5	$ 2,982.4	$ 2,239.4
Restricted cash	25.6	86.0
Accounts receivable, net	2,616.5	1,201.2
Inventories	3,562.3	635.4
Prepaid expenses and other current assets	806.3	197.4
Intercompany receivables	0.0	0.0
Short-term intercompany loan receivable	0.0
Total current assets	7,539.5	2,255.5
Non-current assets:
Investments	191.6	50.8
Property, plant and equipment (“PP&E”), net	6,469.6	828.1
Goodwill	17,888.2	4,147.8	2,474.9
Intangible assets, net	34,697.5	9,173.3	4,934.4
Deferred tax asset	96.7	121.0
Long-term intercompany loan receivable	0.0
Other non-current assets	152.3	33.3
Total assets	67,035.4	16,609.8
Current liabilities:
Accounts payable and accrued expenses	4,312.4	2,050.6
Short-term borrowings and capital lease obligations	3,068.0	1,512.7
Intercompany payables	0.0	0.0
Short-term intercompany loans payable	0.0
Other current liabilities	362.9	142.8
Total current liabilities	7,743.3	3,706.1
Non-current liabilities:
Long-term borrowings	19,899.8	82.1
Deferred tax liability	8,322.7	2,205.9
Long-term intercompany loans payable	0.0
Other non-current liabilities	2,121.6	786.6
Total liabilities	38,087.4	6,780.7
Equity:
Total equity	28,948.0	9,829.1	8,662.9	5,366.0
Total liabilities and equity	67,035.4	16,609.8
Parent Company
Current assets:
Cash and cash equivalents	0.0	0.0	0.0	0.0
Restricted cash	0.0	0.0
Accounts receivable, net	0.0	0.0
Inventories	0.0	0.0
Prepaid expenses and other current assets	1.8	1.9
Intercompany receivables	0.0	0.0
Short-term intercompany loan receivable	0.0
Total current assets	1.8	1.9
Non-current assets:
Investments	35,656.1	14,477.2
Property, plant and equipment (“PP&E”), net	0.0	0.0
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Deferred tax asset	0.0	0.0
Long-term intercompany loan receivable	0.0
Other non-current assets	3.9	5.3
Total assets	35,661.8	14,484.4
Current liabilities:
Accounts payable and accrued expenses	1.3	10.0
Short-term borrowings and capital lease obligations	450.0	1,500.0
Intercompany payables	5,247.1	3,145.3
Short-term intercompany loans payable	0.0
Other current liabilities	0.0	0.0
Total current liabilities	5,698.4	4,655.3
Non-current liabilities:
Long-term borrowings	0.0	0.0
Deferred tax liability	0.0	0.0
Long-term intercompany loans payable	610.1
Other non-current liabilities	405.3	0.0
Total liabilities	6,713.8	4,655.3
Equity:
Total equity	28,948.0	9,829.1
Total liabilities and equity	35,661.8	14,484.4
SAIIDAC (SAIIDAC Notes Subsidiary Issuer)
Current assets:
Cash and cash equivalents	0.0	0.0	0.0	0.0
Restricted cash	0.0	0.0
Accounts receivable, net	0.0	0.0
Inventories	0.0	0.0
Prepaid expenses and other current assets	0.0	9.6
Intercompany receivables	120.5	0.0
Short-term intercompany loan receivable	2,594.8
Total current assets	2,715.3	9.6
Non-current assets:
Investments	0.0	0.0
Property, plant and equipment (“PP&E”), net	0.0	0.0
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Deferred tax asset	0.0	0.0
Long-term intercompany loan receivable	14,431.0
Other non-current assets	0.0	8.3
Total assets	17,146.3	17.9
Current liabilities:
Accounts payable and accrued expenses	85.7	0.0
Short-term borrowings and capital lease obligations	2,594.8	0.0
Intercompany payables	0.0	19.6
Short-term intercompany loans payable	0.0
Other current liabilities	0.0	0.0
Total current liabilities	2,680.5	19.6
Non-current liabilities:
Long-term borrowings	14,431.0	0.0
Deferred tax liability	0.0	0.0
Long-term intercompany loans payable	0.0
Other non-current liabilities	0.0	0.0
Total liabilities	17,111.5	19.6
Equity:
Total equity	34.8	(1.7)
Total liabilities and equity	17,146.3	17.9
Baxalta Inc. (Baxalta Notes Subsidiary Issuer and SAIIDAC Notes Subsidiary Guarantor)
Current assets:
Cash and cash equivalents	41.7	0.0	0.0	0.0
Restricted cash	0.0	0.0
Accounts receivable, net	0.0	0.0
Inventories	0.0	0.0
Prepaid expenses and other current assets	97.1	0.0
Intercompany receivables	0.0	0.0
Short-term intercompany loan receivable	0.0
Total current assets	138.8	0.0
Non-current assets:
Investments	34,644.2	0.0
Property, plant and equipment (“PP&E”), net	27.4	0.0
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Deferred tax asset	273.0	0.0
Long-term intercompany loan receivable	480.7
Other non-current assets	33.8	0.0
Total assets	35,597.9	0.0
Current liabilities:
Accounts payable and accrued expenses	20.0	0.0
Short-term borrowings and capital lease obligations	0.0	0.0
Intercompany payables	27.8	0.0
Short-term intercompany loans payable	0.0
Other current liabilities	64.6	0.0
Total current liabilities	112.4	0.0
Non-current liabilities:
Long-term borrowings	5,063.7	0.0
Deferred tax liability	0.0	0.0
Long-term intercompany loans payable	0.0
Other non-current liabilities	61.7	0.0
Total liabilities	5,237.8	0.0
Equity:
Total equity	30,360.1	0.0
Total liabilities and equity	35,597.9	0.0
Non-Guarantor Non-Issuer Subsidiaries
Current assets:
Cash and cash equivalents	487.1	135.5	2,982.4	2,239.4
Restricted cash	25.6	86.0
Accounts receivable, net	2,616.5	1,201.2
Inventories	3,562.3	635.4
Prepaid expenses and other current assets	707.4	185.9
Intercompany receivables	5,154.4	3,164.9
Short-term intercompany loan receivable	0.0
Total current assets	12,553.3	5,408.9
Non-current assets:
Investments	12,571.8	50.8
Property, plant and equipment (“PP&E”), net	6,442.2	828.1
Goodwill	17,888.2	4,147.8
Intangible assets, net	34,697.5	9,173.3
Deferred tax asset	96.7	121.0
Long-term intercompany loan receivable	0.0
Other non-current assets	114.6	19.7
Total assets	84,364.3	19,749.6
Current liabilities:
Accounts payable and accrued expenses	4,205.4	2,040.6
Short-term borrowings and capital lease obligations	23.2	12.7
Intercompany payables	0.0	0.0
Short-term intercompany loans payable	2,594.8
Other current liabilities	298.3	142.8
Total current liabilities	7,121.7	2,196.1
Non-current liabilities:
Long-term borrowings	405.1	82.1
Deferred tax liability	8,595.7	2,205.9
Long-term intercompany loans payable	14,301.6
Other non-current liabilities	1,654.6	786.6
Total liabilities	32,078.7	5,270.7
Equity:
Total equity	52,285.6	14,478.9
Total liabilities and equity	84,364.3	19,749.6
Non-Guarantor Subsidiaries of Baxalta Notes
Current assets:
Cash and cash equivalents	487.1	135.5	2,982.4	2,239.4
Restricted cash	25.6	86.0
Accounts receivable, net	2,616.5	1,201.2
Inventories	3,562.3	635.4
Prepaid expenses and other current assets	707.4	195.5
Intercompany receivables	5,274.9	3,164.9
Short-term intercompany loan receivable	2,594.8
Total current assets	15,268.6	5,418.5
Non-current assets:
Investments	12,571.8	50.8
Property, plant and equipment (“PP&E”), net	6,442.2	828.1
Goodwill	17,888.2	4,147.8
Intangible assets, net	34,697.5	9,173.3
Deferred tax asset	96.7	121.0
Long-term intercompany loan receivable	14,431.0
Other non-current assets	114.6	28.0
Total assets	101,510.6	19,767.5
Current liabilities:
Accounts payable and accrued expenses	4,291.1	2,040.6
Short-term borrowings and capital lease obligations	2,618.0	12.7
Intercompany payables	0.0	19.6
Short-term intercompany loans payable	2,594.8
Other current liabilities	298.3	142.8
Total current liabilities	9,802.2	2,215.7
Non-current liabilities:
Long-term borrowings	14,836.1	82.1
Deferred tax liability	8,595.7	2,205.9
Long-term intercompany loans payable	14,301.6
Other non-current liabilities	1,654.6	786.6
Total liabilities	49,190.2	5,290.3
Equity:
Total equity	52,320.4	14,477.2
Total liabilities and equity	101,510.6	19,767.5
Eliminations
Current assets:
Cash and cash equivalents	0.0	0.0	$ 0.0	$ 0.0
Restricted cash	0.0	0.0
Accounts receivable, net	0.0	0.0
Inventories	0.0	0.0
Prepaid expenses and other current assets	0.0	0.0
Intercompany receivables	(5,274.9)	(3,164.9)
Short-term intercompany loan receivable	(2,594.8)
Total current assets	(7,869.7)	(3,164.9)
Non-current assets:
Investments	(82,680.5)	(14,477.2)
Property, plant and equipment (“PP&E”), net	0.0	0.0
Goodwill	0.0	0.0
Intangible assets, net	0.0	0.0
Deferred tax asset	(273.0)	0.0
Long-term intercompany loan receivable	(14,911.7)
Other non-current assets	0.0	0.0
Total assets	(105,734.9)	(17,642.1)
Current liabilities:
Accounts payable and accrued expenses	0.0	0.0
Short-term borrowings and capital lease obligations	0.0	0.0
Intercompany payables	(5,274.9)	(3,164.9)
Short-term intercompany loans payable	(2,594.8)
Other current liabilities	0.0	0.0
Total current liabilities	(7,869.7)	(3,164.9)
Non-current liabilities:
Long-term borrowings	0.0	0.0
Deferred tax liability	(273.0)	0.0
Long-term intercompany loans payable	(14,911.7)
Other non-current liabilities	0.0	0.0
Total liabilities	(23,054.4)	(3,164.9)
Equity:
Total equity	(82,680.5)	(14,477.2)
Total liabilities and equity	$ (105,734.9)	$ (17,642.1)