Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Income Taxes [Line Items]
Effective income tax rate	(1.70%)	9.50%
Effective income tax rate excluding discrete items	22.00%
Decrease in gross unrecognized tax benefits	$ 85
Baxalta Inc
Income Taxes [Line Items]
Decrease in gross unrecognized tax benefits	34
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Payment made for partially settlement on US Federal income tax audit for the period 2008-2013	$ 303
Internal Revenue Service (IRS) \| Earliest Tax Year
Income Taxes [Line Items]
Income tax period under audit	2008
Internal Revenue Service (IRS) \| Latest Tax Year
Income Taxes [Line Items]
Income tax period under audit	2013
Federal Ministry of Finance, Germany \| Earliest Tax Year
Income Taxes [Line Items]
Income tax period under audit	2008
Federal Ministry of Finance, Germany \| Latest Tax Year
Income Taxes [Line Items]
Income tax period under audit	2011

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Income Taxes [Line Items]

+ References

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

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Tax year being audited in the income tax examination, in CCYY format.

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The net amount of all increases and decreases in unrecognized tax benefits for the period.

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